I am female, and I am dm too, at times.
I was dm more often in the past, but then I become more lazy and sticked for player's role for few years. Not totally, but mostly.
I have started to dm more games recently, but I feel I have kind of lost my touch. It's not the new system or anything, I used to know a lot of different systems and I still do. I kind of plan adventures half-way and have then "ok where I should take this next" -feeling I can't get over. Having players who don't give ideas what kind of common direction they'd like campaing to go (more combat, more plot or less combat less plot and that kind of things.)
Then there is the fact that I rather just play, because I don't have to plan so much. Then I find myself planning for those who dm at times. Create all kind of source material for them, they may or may not use. My own stuff starts to bore me. I get bored easily. I prefer unpredictable. As player, things are a bit more so.
I probably would still like being dm more, if I was still with my old group. But usual life stuff happened, they moved elsewhere, got married and stuff like that. Those people weren't that predictable as players and there was more time and interest in general for role-playing games then.
But since people keep pushing me to dm more I guess I will give in and keep it up for few years.