I'm A Guy, and I have hair that used to reach to my chest.
Then I got dreadlocks, and it got shorter because they got bunched up. and I will tell you My expirience having Long(Ish) hair. and My hair isn't long enough to be put in a ponytail so. :T

CONS:
People Call Me A "Stoner"
I am asked if I am a girl a lot
I am asked if I am gay a lot
People ask me if I am from africa/ am I a terrorist (Wtf?)
I am treated VERY differently from most
Food gets in my hair a lot
Hair washing *shudder*
water gets in my hair whenever I try to get a swig of water from the water fountain

PROS
Extra dramatic entrances
people will underestimate me
I can kill flies if I spin my head really hard