I really love it!
There's nothing better to let off steam than hitting someone - even just practicing the basic technics (why, oh why is the advanced training on the one evening I don't have time?) calms me down considerably.
Being hit (after I've convinced the men that yes, I'm female, but no, they are not supposed to hold back when kicking or hitting me) is very important, too. I tend to forget that I'm not invulnerable sometimes. Nothing like a foot connecting at high-speed with my rips to remind me that this body is actually able to feel pain.
And it's good for my ego to see that I can still do more press-ups (real ones, not the strange ones on the knees) than half of the male participants.