Boxing, wrestling, karate I understand the interest. To the casual observer Mixed Martial Arts is nothing more than legalised blood-letting, lions and Christians for a modern audience.
Boxing, even with its innate brutality, has moments of skill and grace. I'm not a fan of blood sports. Watching two guys in the ring or on the mat doesn't do it for me. That said, I'd watch those over M.M.A.
From the clips I've seen M.M.A. is nothing more than an excuse to see how close to men can get to murder without serving time.
Give me a good old bench clearing brawl instead.