I enjoy a good boxing match but don't think it holds a candle to an MMA match. To me boxing is like 1/2 a sport. Or, probably more accurately, a 1/4 of a sport. A "fighting" sport where you can't kick, elbow, grapple, throw or submit? Why not set up a basketball game where you can't dribble, pass or dunk while you're at it.
I'm not hammering boxing too hard because again I enjoy a good boxing match. I think boxing is far more a sport and far less of a fight than MMA. MMA is definitely not an all out fight (no headbutts, gouging, etc.) but it's closer and therefore more entertaining to me in that regard.
Just my 2 cents.