Other than MMA, I like Football (soccer), Rugby and Boxing, and watch them all the time. I don't watch the womens versions of any of those sports, because the games are slower, sloppy and just boring when compared to the men.
This goes for MMA too. The only difference is I can watch and enjoy say, a football match from start to finish without having to entertain half an hour of a womens game shoved in the middle of the broadcast.
Watching the UFC, you're force-fed the women's version of the sport, and I don't think any other sport does that.