I like long hair on women. Not fall-to-the-floor long, but if they carry it well, definitely as long as the middle back.
I also like medium-long hair for myself. I like it when it reaches the bottom of my neck. I also like it short in the front, since it gets irritating to brush it out of my eyes and around my ears.
(SPOILER)aka: a mullet
Unfortunately, I have to keep my hair short because I manage a business and want to look professional, not to mention my customers are some of the most judgemental people around.

But yeah. Please keep your hair long and beautiful.