Okay, first off? A big "BOO" for not letting us include Grayson. I mean, he's the obvious, canonical #1 sexiest man in the DCU!
Which.....I suppose, makes it less fun since everyone else is just competing for that #2 spot......
Okay. So I've always found this sort of topic a little weird. I mean, these are two dimensional drawings of fictional characters, and for the most part they all look alike (super model/body builder/porn star body types). I dunno, some people can get into drawings and cartoons but I'm not one of them. So I'm kinda looking at this from a "character" standpoint more than anything.
Female.
1. Starfire. I mean, she's got that crazy porn star body, even by the standards of superheroes, she's comfortable with her sexuality and knows what she likes, she's kind, sweet, funny in a accidental sort of way....she's basically every guy's "Swedish exchange student" fantasy but with super strength and flight and better hair.
2. Ivy. She's got that crazy redhead vibe going on, a great figure, and on top of that is just leaking that femme fatale sexy "I might kill you after I kiss you and you'll still love it" attitude. I used to get into a lot of very fun trouble with redheads, and ended up being very, very wary of them as a result (so much fun....so much trouble!) but even I have to admit, Ivy's one sexy chick.
3. Lois Lane. She's usually the sharpest woman in the room, and has achieved great success in her field without sacrificing her feminism and sex appeal. Plus.....those pencil skirts man. Hard to resist brains and beauty, especially when they're wrapped up in those tight pencil skirts. When Erica Durance played her.....yeah, after years and years of reading Superman comics, I finally got why Clark would chase this girl so hard. I would too if I were him.
4. Black Canary. Okay, this is mostly just a "me" thing but I really dig a hardcore, badass biker chick who's also sexy as hell and knows it. And Dinah's probably got the best ass in the hero community. She mixes that biker aesthetic with some retro Marilyn Monroe sensibilities (especially under Timm's art; that hair is great) and seems like she'd be at home drinking beer in a bar or in a gown at a ball. And she can sing like nobody's business, and I am a total sucker for a sexy singing voice.
5. Zatanna. There's something very appealing about that knowing twinkle in her eye and the slight smile that says she probably approves of whatever you're thinking, and she fills out the tux better than just about anyone. Probably got some of the best legs in comics too. I gotta admit, I've never really thought of Zee as "sexy" but trying to think of who #5 would be she seemed about the only really viable option.....though I also considered Vixen and Roxy Rocket and Power Girl and a few others, and Shay Veritas would probably get my vote here if her character hadn't taken a weird detour in the pages of Supergirl (I really was digging that crazy skin tone/hair color combo and her weird skintight science outfit and the mystery of who she was, as well as her intellect; that was one damn smart woman!).
Men.
To this day I don't get what women find appealing about guys. But I'll give it a shot. In no particular order.
1. Kyle Rayner. I'm guessing, in keeping with his "everyman" archetype, Kyle's probably not *that* good looking. Like, good looking in an above average sorta way, but not stopping traffic. But he's a sweet, sensitive guy in touch with his emotions and he's an artist. And women love artists.
2. Kaldur'am/Aqualad. Stoic and calm but with hints of a deeper passion lurking beneath the surface, with great skin and pretty eyes. Hell, even *I* think Kaldur's kinda pretty.
3. Bruce Wayne. Tall, handsome, intense and brooding. Looks good in a suit. Seems almost textbook doesn't it?
4. Ollie Queen. He's passionate and really believes in his cause and helping the little guy. He can cook one hell of a chili. A great outdoorsman and capable of taking care of himself. And emotionally broken and jackass-y, which a lot of women seem to be drawn to? A little shaggy, but some girls like that too.
5. John Stewart. Black, bald, and beautiful. He's smart as hell, and being an architect is sort of like being an artist who can also build stuff. A soldier's discipline and the passion of an angry black man who matured out of his "pissed off at everyone, chip on his shoulder" phase. I imagine John would make women feel very safe and protected.