These may make me sound like a chauvinist, but I am traditional when it comes to girls, so try not to get too offended:
I would not date a practicing Catholic, except maybe if they're Hispanic or Italian. I'm a neutral agnostic, with Czech Hussite roots, so you can imagine why I'm not a fan. But I also have strong beliefs that go against the Vatican. Other than that, I would pretty much date any a girl of any religion, as long as they aren't overly religious or overly atheist.
Wears black makeup or is into anything dark like emo/goth/whatever...I prefer a clean, all natural look like I myself maintain.
Is an obsessive fangirl.
Weighs more than me, I'm skinny myself and can't go for a fat girl.
Smokes anything or drinks heavily. Pills are OK though.
Does not maintain proper hygiene
Absolutely no piercings or tattoos, only pretty earrings and nothing else...again, clean and natural look is the only kind I am attracted to.
As I grow older I would not date a woman who...
makes more $ than me. I would rather date a poor immigrant (preferably from Eastern Europe ) than a career woman, partially because of my traditional beliefs and because I want to buy her things and treat her well, and usually poor women appreciate that better and deserve it more.
Wants to have kids with me...I don't want to have kids. Kids from a previous relationship are OK because they aren't mine and aren't dependent on me. I am too self centered and will never have kids, but I'm glad I have come to that realization.
Does not want to travel and isn't cultured
Has had plastic surgery or breast implants. Sure, in a Victoria's Secret ad you have to be busty but I agree with the post by Slipperman. Again, I will only date women who treat their body like a temple.
Other than that, I'm pretty much open to anything. I know I may sound picky but the girls I know and like being around meet those standards.