I'm a chick; I'm a bundle of emotions and lack of self-esteem. It's nice when guys signal interest in me. Sure, it could get disturbing if it goes on too long, but that's not limited to nerd boys. All guys can do that.
I actually try not to be flirtatious around nerdy guys; I'd much rather share their interests and be their friend than be some "hot nerd chick" who is really only there for the attention. If they appreciate the fact I'm female and like how I look, that's a bonus, I guess?
I've had my fair share of nerdy attention. Hopefully this is because I'm fairly friendly, and like talking about sujects that are common to nerds.
EDIT: And, yes, I like nerdy boys myself, and do seek them out, for friendship as well as for romance. My fiance is a hopeless nerd whose favourite activity is organising LAN parties- all the better for meeting more nerdy friends...
