I have very straight hair...and I like it!
Although I admit, I used to want blonde curls instead of my straight brown hair...that is, until I saw what my curly-haired friends have to put up with just to get their hair to behave! I've also seen some people with hair that really, really curly but it's also thin, and I don't think that looks all that good...so I'm happy with the hair I've got! All I have to do is brush it--no gel or hairspray necessary.
As for guys...all kinds of hair is fine, except I don't find it especially attractive when a guy's hair is longer than mine!