My 2 sisters grew up with long hair, for about the same reason the hair on their brothers was kept short (cultural conservatism). I remember when my youngest sister got hers cut shorter, and to this day she wears hers somewhat shorter, a bob cut, while my other sister still wears hers a little longer. (My younger brother today keeps his head tightly buzzed but not shaved, and my youngest brother wears his pretty to mission standard.)
A few years ago I started going shorter, having it buzzed almost transparent on the back and sides, and just barely part-able on top. But now I'm trying something different. My last "haircut" was in December, just before the holidays. The funny thing is, most people when they notice the change, they don't ask if I'm growing it, they ask if I've cut it! Heh.
I had it trimmed last week at the Patrick Bear Salon, selected on the advice of a friend (who also wears his hair long), not trimmed to shorten it, but trimmed to clean it up. It looks a lot better.
I've started looking more closely at the hair of other long haired men, to see how they groom it. However, I don't want a mullet. A mullet looks decent on some of my friends, but I don't want it on mine.
It's almost but not quite yet long enough to tie back. But it will be in a few more months.
The experiment is, how long will it get? The limiting factors will be either it's natural length, or when I wake up some morning and decide that it's got to go.