I love all the possibilities and unexpectedness of an MMA fight. In boxing there's not many options, good boxing match, good brawl, boring boxing match, sloppy-ugly brawl. MMA has so many different things that can happen, like who ever thought you'd see an entire round with someone having standing back control in the UFC? So much shit can go down in an MMA fight, and that's just in terms of ways of fighting or winning. The unpredicitability in terms of who wins, like dude pointed out - is much more in MMA than boxing. In boxing if someone is clearly overmatched all they have is a puncher's chance. In MMA, ANYTHING can happen and it's been proved 100,000 times in the short history of the sport. Those are the main things I like about the general sport of MMA.