Well hello! 
I’m a fried food-loving, sweet tea-chugging, NASCAR-watching Southerner, a liberal college student and journalist and a computer geek.
Yes, I know, a technology-literate liberal Southerner is the biggest contradiction ever, but it’s true.
Perpetuating: I’m a liberal feminist college student.
Defying: I’m a Christian.
Well, I’m a polyamorous neopagan who wears lots of long, flowy skirts, likes to dance topless around bonfires and is really into herbal medicine, acupuncture and massage therapy. I have three altars around my house with varying levels of crystals on them (but only 'cause I think they’re pretty.) I like camping, walking skyclad (naked) in the woods (but always bring a towel with me to sit somewhere.) I make my own herbal medicines, from plants I grow or wild-harvest myself. I enjoy smoking the green, and have occasionally been known to say “Dude, that’s sooooooo wonderful!” with a glazed look in my eyes. I know what Qi is, and how to move it. I talk to plants.
Around here, I’m probably considered a pinko commie left-wing liberal whackjob.
Around my pinko commie left-wing liberal friends IRL, I’m considered a stodgey, stick-in-the-ass conservative right-wing fascist who won’t shut up about Scientific Research being a good thing.
You know the old saw about all extraterrestials trying to lie low on Earth winding up in Civil Service jobs? I’m living that one.
I’m from West Virginia, and I play country and western music (the old kind, not the modern “Suburban and Southern” variant).
I’m half Greek, and always seem to be working in restaurants. (Has anyone ever heard this sterotype? It was really prevalent while I was growing up, but has become much less so).
I’m a quarter Irish, and I drink like a fish.
I’m an engineer/mathematician, and I tend to over-analyze every-day things.
You know Tina The Brittle Tech Writer from the Dilbert cartoons? I’m her, only with better hair and glasses. I’m uptight, I hate my job, <pauses to shake tiny impotent fists of death at Wolfman>, a rules-lawyer and on-time to meetings.
I wear birkenstocks and no makeup. I drive a pickup truck usually wearing a man’s plaid shirt. I’m noisily pro-gay-marriage and left-wing. I’m a feminist. I have cats and plants that I talk to. I like power tools, camping and sports. I hate the color pink. I wear nearly no jewelry. I was fired once because my supervisor thought I was a lesbian. At another job, a coworker apologized to me when he verbalized his homophobia (I was baiting him on purpose ‘cause he was a jerk). I am, however, married to man (an evil computer programmer! But I forgive him because he can construct a decent sentence).
I’m quite sure we are all Texan.
I’m a vegetarian liberal from California. My parents were/are hippies and I have a pair of Birkenstocks.
However, I bathe regularly, shave my legs (well, not so much in the winter), have never done any sort of drug, am disinterested in either the Grateful Dead or Phish, love baseball, and enjoy mocking the crazy, disconnected-from-reality (“sign this petition to free Mumia, dude!”) people I went to college with.
I think he meant to say “not”. The phrasing’s pretty awkward otherwise and, as you said, a bigoted homophobe wouldn’t admit to it so publicly.
I perpetuate the stereotype that white guys suck at basketball. Actually, I’m not sure how much of a stereotype that is, but damn, I suck at basketball.
The board ate my nicely snarky reply, so I’ll just say this:
While I’m Asian, I’m neither an immigrant nor shy and retiring…
What I am:
An English major. My command of the English language is quite likely just as good as if not better than yours. And no, I don’t know any Chinese, Japanese, Korean, Indonesian, Vietnamese, or whatevertheheck the language that’s associated with my putative ethnicity is.
Rather ungirly. Makeup, dresses, heels? Once a year, baby. (Although I was raised to be the kind of lady who wears pantyhose even in the depths of a Texas summer… go figure.) These days I’m more likely to wear motorcycle or combat boots to work.
A sick puppy. The Dead Rubber Ducky and the Brian Froud Pressed Fairy calendars in my office at work prove this, apparently. I will also tease people loudly and mercilessly once I’ve gotten to know them.
My cats are collectively known as “Them Wee Fuzzy Bastards”.
Oh yeah, and I knit. Badly. 
I’m a music nerd. I think that vinyl is better than CD and mp3 is almost unthinkable. You’ve never heard of my favorite bands. I think that everyone’s “first album was better, before they got all popular.” I’ve often gone without buying groceries, and even gone without buying medicine when I was sick so that I could buy records. I look down on the characters in “High Fidelity” because “they’re really not that into music.” I have worked at a record store (where I ridiculed your pedestrian tastes) and a college radio station (where I only played stuff you’ve never heard of and will never hear again). I am in a promising local band who will break up before ever actually accomplishing anything, like the 10 bands I was in before.
Perpetuate:
Gay Male: Ears pierced, like men, intelligent.
College student: Perpetually poor, play guitar really badly, know a bit about computers, download things for free, masturbate a lot.
Teenager in general: Got 2 speeding tickets in a week, work at McDonald’s, masturbate a lot.
Disprove:
Gay Male: Masculine, not fashion-minded.
College student: Don’t rely on parents for money, don’t really drink or do drugs (did that in HS.), and disproving the “stupid people go to state school” one.
Teenager in general: Independent, except on breaks, where I buy my own everything, and sleep at my parents’, have held down the same job for almost 4 years.
Stereotypical: I am the old spinster teacher lady with lots of cats. As an English teacher, I have grammar and spelling pet peeves that make me want to rap people on the knuckles with rulers. I am a vegetarian, save the wolves, recycling, petition-signing animal lover who likes cats more than people and is a misanthropic human-hater to the core. I am a gamer chick who loves to date the DM. I’m an Italian/Jewish American who talks with her hands, feels guilty a lot, speaks really fast, and loves lasagne, homemade mozzarella, kosher dills, and bagels with a schmear.
Not stereotypical: I listen to Eminem, 50 Cent, and Jay-Z. I plan to get a dog. I never use spellcheck on e-mails. I love my students and think they, and most other kids, are the best company. I never play magic users because I can’t be bothered to read the rules. I don’t ever date Italian or Jewish men, always the damn WASPS, and couldn’t possibly be less Catholic or Jewish, religion-wise.
I perpetuate the geek who will always want to debate things that interest me. I may not have any great objections to the position last stated, I just feel a driving need to discuss things anyways. I like biiig words. I’m the old school male anime fan: I am overweight, socially inept, and like heavy metal.
I break the following stereotypes: I am not the jolly fat boy/man. I just hide my temper better than some. It can be volcanic when it gets loose. (Which, of course, is part of why I keep it on a tight leash.) I shower regularly. I am not a child molester, a rapist, nor a sex fiend waiting to be unleahsed on innocent young women. I am a straight man who loves cooking - seems to me that would go with the overweight thing, but I can’t tell you how many times I’ve had people stare at me for saying I’ll be going to cook something or other (Often something complex, like, say, a medium rare steak :eek: ) once I get home. (How the BLEEP do you think I got this big if I never learned how to cook? Hmm?)
I perpetuate the polite softly spoken diplomatic values of the English Middle Classes.
Mostly though I try to go against steriotypes. So though I happen to be a straight male, I have many pairs of shoes, and clothing looks, and I can out-freak most of San Francisco when I go partying. I asspire to being a straight talentless Fredie Mercury.
I’m a bad-dressing, wild-hair-having, big-word-using, socially-inept scientist.
I will blurt out the names of every plant I see, even when I’m by myself, further fulfilling the stereotype of the nerdy scientist.
As a girl, I’m sensitive and I cry easily. I don’t get sports or competition, and I cringe whenever I’m around violence. I’m also physically weak.
I like fried chicken and collard greens and I listen to R&B. I also like to sing and dance, and will do so in public even though I’m not good at either.
I’m a diplomatic middle child.
I’m a white man in northern michigan who loves the red wings and can talk hockey for hours and sees absolutely nothing wrong with yelling at the television when the linesmen blow a call.
I’m the really nice funny guy who’s kinda cute but never gets the girl. Course I blew that when I got the girl, but it’s still a stereotype that I fit mostly into.
I’m an overprotective father who will do very bad things to any boy that gets too close to my daughter. She may only be eight, but I think it’s best to get an early start on these things.
I’m thin and can eat whatever I want without gaining a pound. I have naturally long eyelashes and look a lot younger than my years. That makes me the man that women hate. 
That all Teens, sag their pants, listen to loud music and are know-it-alls.
That all black people like rap music, play basketball,write graffiti and want to record their own rap songs.