“That man has the constitution of a vending machine!”~~ Cobra Commander
“Why, OH WHY? Are great men always surrounded by lesser beings?!”~~ Also Cobra Commander
Replies Roadblock: “I ask myself the same question, FOOL!”
"What are those?!"~~ Starscream (points to Dinobots)
“Scrap metal! Once we’re through with them!”~~Megatron.
And, for sheer Menthos Level Coolness–
Forgot these from the Simpsons:
I told him to do that!
Why can’t he be both, like the late Earl Warren?
I’ll keep this short, or we’d be here all day:
Looney Tunes:
“What’s a matter Cuddles? Did your toy break?”
“Yikes, and Away! Yiikes…and away…yyyikkkes…and away…”
“One! Two! Three strikes you’re out!”
Simpsons:
“Have the Rolling Stones killed.”
“But sir, those aren’t the–”
“DO AS I SAY!”
“There’s no emoticon for what I’m feeling!”
“Rest assured I was on the Internet within minutes, voicing my displeasure throughout the World.”
“No problem chummmmmmmmmmm-P”
“You’ve ruined everything, you ruiner! [sub]My sister likes you[/sub]”
“I am Clin-Ton. As overlord, all will kneel trembling before me and obey my brutal commands. End communication.”
(Every time a group is suggesting where to go to dinner): “Professor P.J. Cornucopia’s Fantastic Foodmagorium and Great American Steakery!”
Futurama:
“If we hit the bullseye, the dominos will fall like a house of cards. Checkmate.”
“We commend the body of our great Pharaoh Hamenthotep to the abode of the damned! The damned good-looking! Pharaoh commanded me to tell that joke at his funeral.”
“Yes! Front row!”
“Blegh! These candies are chalky and unpleasant!”
"The big brain am winning! I am the greetest! Mwa-ha-ha-ha! I must now leave Earth for no raisin! "
“Turns out it’s man.”
And of course: “WINDMILLS DO NOT WORK THAT WAY! GOODNIGHT!”
ETA: Believe me, that was short. 
Most of the day to day quotes in my head are cartoon references, either Simpsons or Looney Tunes. A few Tom and Jerry ones, plus the “If Woody had gone straight to the police, this would never have happened” comes up a few times every year.
If you can mentally picture the scenes that match these quotes you’re my kind of person…
Tom and Jerry:
“Touché, pussycat!”
“It is not just a little spark: it is a flame! A great, roaring flame!” (“sniff Say, something really is burning around here!”)
Looney Tunes:
“South America, take it away!”
“You’re just a loud-mouthed schnook!”
“Everybody’s doin’ the Michigan Raaaaggg… That lovin’ rag!”
“I’m not like other people. I can’t stand pain!”
“A very good idea… Fool!” (“Unless you bring back the Singing Sword…”)
“Ooooh, I warned you about lettin’ your fire get low! Now you’ve gone and caught cold!.. Dragons is so stupid!”
“I’m the little feller’s mother… And I’ve been so… WORRIED about him…!”
“Oh no, no tea. Tea gives me a headache.”
“Har har, har-de-HAR-har!” (Winning at Blackjack on the single card, a 21 of Hearts)
“Well, I was just passin’ by… Duh… Just passin’ by…”
Um, I’ve been turned into a cow. May I go home?
Forgot this one from a very early original TMNT
“Morons! I’m surrounded by morons!”
“D’oh!”
“Exit, stage left.”
“Heavens to murgatroyd!”
“Watch me pull a rabbit out of my hat!”
“No sir, I don’t like it.”
“Move your butt, Stimpy! It’s a higher mammal!”
“Log!” (said overly lovingly)
“Iiiiit STINKS!” (from “The Critic”)
“He don’t know me vewwy well, do he?”
“The little bunny guy was chafing, so I let him go.” (from “The Tick”)
From comic strips:
“Cat fud” (pronounced like Fudd) and “Oh please oh please oh please…” (Far Side)
“Who wrote ‘help i’m a bug’ on my letter to Grandma?” “Evidently some bug. How strange.” (Calvin and Hobbes)
“Barkbarkbarkbark!” (Bloom County)
“Peel back foil to expose tater tots” (Bloom County)
(Yes, the spouse and I quote these all the time. They’ve become our in-joke verbal shorthand for various things.)
Yep, I quote Snagglepuss a lot to. Sometimes including the line from above, and sometimes not when I say: “I’ve been robbed… stolen even!”
Also I seem to quote Foghorn Leghorn frequently. “That boy’s about as low as a snake full of buckshot.”
One of my favorite bits from that cartoon was an incident where Krang suddenly produces a highly specific mcguffin. (I think it was a gadget that would enable him to control a military robot from the future.) Shredder stared at him in disbelief and said something on the order of “You just happened to have something like that lying around?” I’ve been known to use Krang’s response when people when people give me that look after I unexpectedly produce some odd-but-useful item or information.
“We’ve got to keep the plot moving!”
(It comes up more often than you’d think. I have endless pockets, an adventurer’s backpack, and a truck that my friends occasionally compare to the TARDIS.)
To be followed by: “I’m comfortably well off.”
Man, I keep using ones that I don’t remember I use:
“Who shot who in the what, now?”
and
“I suppose, Captain. I’m not as big a fan of velour as you are.”
Whenever someone (especially my wife) asks me to help them in some way I immediately break into the Mighty Mouse song of: “Here I come to save the day…”
You’d be surprised how seldom you get asked to help people after the first few times you sing that.
“I don’t have low SELF esteem. I have low esteem for everyone else” (Daria)
“Slowpoke Rodríguez, he pack a gun” (Loony Tunes)
“It’s a shame, a dirty shame… A shame I never learned to read” (“Perry Gunite”, Flintstones)
Ah, The Tick.
“Destroy the Earth? That’s where I keep all my STUFF!”
“We need a battle cry, something to shout as we leap into battle.”
“Oh, you mean like, NOT IN THE FACE, NOT IN THE FACE?”
“Hmm… Lacks conviction, chum.”
“Isn’t sanity just a one trick pony? You only get one trick: rational thinking. But when you’re good and crazy, the sky’s the limit!”
And don’t forget…
"I will name him George, and I will hug him and pet him and squeeze him… "
and
“Stroke! Stroke! Stroke!”
“Bail! Bail! Bail!”
It’s, like, Eggs 101.
“Oh please, oh please . . .”
**CAT FUD
**
“Bummer of a birthmark.” Far Side
“Cat : a hell of a nice animal frequently mistaken for a meatloaf.” Kliban
Invader Zim:
Shut your noise hole, taco human!
I like dookie!
Not my squeezin arm!
You got any of them taquitos?
Not right now, son. I’m making TOAST!
I’m trying to draw little piggies. Can’t you see I’m trying to draw little piggies?
Your voice is stupid.
Hey! Someone’s making doughnuts!
I miss you cupcake.
I was a fairy princess once… And then everything went horribly, horribly wrong.
I saw a squirrel. He was doing like this!
Okey dokey, Doggie Daddy.