I hacked it all off once after growing it out for close to 5 years. Kept it short for about 3, then started up again about 4 years ago. I don't plan on cutting it until it passes my waist, and even then no shorter than just beyond my shoulders. I love having long hair. It goes a long way (bad pun) in helping me pass, and I get a lot of compliments even when in drab.
