I would also suggest that if you think you will miss your hair, don't do it. I was almost at the point where I hated my long hair, and so I cut it and I'm happy. I don't think I will ever want to grow it out again. To me long hair = a lot of work, long drying time, getting caught under elbows when sleeping, etc.
if you feel this kind of hostility towards your long hair AND think it doesn't even look good, then cut it lol.