Most of the guys I know prefer longer hair, but I would say that there is a limit. Personally mid back is about as along as I would prefer a girl's hair. Anything longer and I feel it would start to become cumbersome. Plus I think it sheds more when it is longer right? Guys HATE cleaning out the shower drain and finding the little girl from The Ring. After cleaning out my fair share of shower drains, I'm pretty sure my ex was half Wookie.
i think hair that long is nasty and I would never date someone with that long of hair... It's VERY VERY unattractive, however long hair a quarter way down the back is good, rather than growing it out.. get a haircut.. sorry if this offends you
I've always had a ton of guy friends and they always tell me they love long shiny hair (which is part of the reason I'm growing it out hehe). Also, biologically speaking, men are built to react positively to long shiny hair because it is a sign of good health and therefor fertility.