Women in armor. Not “chain mail bikinis”—full, protective, armor. Medieval or modern, it’s all good.
Suspenders. With buttons. Do not ask me why. My boyfriend prefers them to belts under good suits, and I’ve discovered it really does it for me.
I also find men with guns a turn on. Especially a fast draw.
I think maybe I watched one too many late night western while going through puberty.
Nerds.
Neckties with dress shirts. Ooh, man.
Dress shirts without neckties, unbuttoned.
Large noses. Yep.
Tweed.
Can’t believe I forgot to mention this. The hottest women in the world are the ones who are gorgeous and look like they stepped right out of bed looking that way, especially if they add in a little bit of “I’m gorgeous, I know I’m gorgeous. I don’t have to spend a minute of my time to look like this. Jealous? You fucking should be!” without the nasty edge.
My other half has developed these crow’s feet round his eyes when he smiles. Everytime I see them, I melt.
Masculine forearms. Not necessarily muscular, but just strong looking, with dark hairs extending onto the wrist. They make me want to lick them. 
As was mentioned here, a nice neck. I find a long, slender neck with a nice natural skin tone to be a turn on. It makes me want to just nuzzle into it, sniffing and kissing.
And another vote for the natural, non-obvious made up look. If make-up is caked on, it’s noticable and looks like shite.
Oh, and hair. I love nice shiny hair on a women. It doesn’t matter the colour or the length, but it’s something that I’ll notice from far away and wish to learn more, visually, about that person. By shiny I mean, not oily, but soft and satiny looking.
Those surfer guy beachy rope and/or shell necklace/choker thingys. This is a completely sub-thought reaction. They make almost any guy more attractive to me. Which is weird, because the whole surfer guy persona doesn’t appeal to me particularly.
Men on horses. Cowboys, ren faire jousters, English lord types in period mini series. Put a guy on a horse and …drool. He has to look like he knows what he’s doing though.
Straight woman FTR
Suspenders? :: perks up :: Why, what a coincidence! I’m rather taken with –
checks English to American dictionary
Oops. 
Carry on. Nothing to see here.
I’ll second what Habanero said about martial arts; it’s my biggest turn-on. The athleticism, the grace, the power – WOOF!
I have never been on more than one date with a woman who wears makeup.
White button-down shirt, rolled at the sleeves, worn with blue jeans. Oh my word.
Men in suits. Yow.
The sight of a man washing dishes by hand. My knees get weak.
That’s harsh! A lot of women who wouldn’t normally wear make up might wear it for a first date, then wonder why they never saw you again… 
Gals with real long hair. Down to the waist long. I shouldn’t like it, both my ex and current spouse both had long hair and you find it in just about everything, especially freshly washed laundry. Long hair seems attracted to underpants, that is where I would find these wads of hair.
Not so strange: A breathy bedroom voice. A la Jennifer Tilly or that “Gimme Gimme” chick in Weezer’s Beverly Hills. But only in small degrees.
Stranger: A woman who plays video games. It says “not only am I a geek when I have to be, but I geek out my free time, too.”
/OMD, whose fiancee is a glasses-wearing Math major with a PS2.
Under 5’3" or over 5’8".
Long waist, short legs. (I’m built that way myself.)
A long slender figure with slightly wider hips than normal, or even a little bit more grab-handle.
Short bobbed hair, especially if black and wavy. Especially especially with pale skin.
Elegant, strong, remarkable hands or feet.
A lantern jaw, or a long neck, or a heart-shaped face.
The retro-metro look: black to dark-blonde hair, pale skin, blood-red lips, heavy framed glasses.
A business suit or dress with heels and no stockings.
Sundresses in summer.
Dark wool stockings and laced oxford pumps in fall.
A clean style, by which I mean a certain lack of foofy accessories.
L-sounding names: Lisa, Julie, Alison, Laura, Melissa, Ellen, Elizabeth. What a sweet name is Elizabeth. Say it softly and slowly: E liiiiz a beth.
Old-relative names like Jean, Joan, Helen, Eleanor, Marjorie.
The appearance of obvious ethnicity that stops short of archetype. You know the way Maura Tierney is Irish, or Lisa Loeb is Jewish? Kinda like that.
A low-pitched or “whiskey” voice. I had it for a gal in college who talked exactly, I mean EXACTLY, like Sandra Bernhard. Short honey-blonde bob, deep blue crinkly eyes, snub nose, body of a dancer (except for perfect silky white feet), soul of a nymphomaniac, and NO heart.
Freckles…alllllllll over.
Ooh- Yeah.
I’m a nose-person too. Though, I like 'em on women. I also like boy shorts. And low-rise jeans. And clunky shoes. And glasses. And a snaggletooth.
Women who use interesting eye make-up.