Kate has asked if short hair is really better. The answer is no.
I like being able to put my hair in a ponytail that doesn't look ridiculous. I don't have to blowdry it if I don't mind it being wet. I can make it be pretty in many different ways if I care that much. I look like a girl. I can braid it. I only have to get it cut when I feel like it, instead of every 4-6 weeks. It doesn't get in my eyes when it grows. No one calls me "sir" on the bus. If I wear it down, the shop guys tell me I look pretty (that's a double-edged sword, but a girl needs an ego boost sometimes).
Short hair took just as much or more work and was less attractive. That's all there is to say.