http://www.megavideo.com/?v=41PQ7CG6
Skip to about 8 minutes in and watch the video from there. Two top notch fighters at the top of their division in the UFC, and they are both all class. That was just the first example that came off the top of my head. Most fighters in the UFC, and MMA guys that I workout with regularly are by and large, very humble dudes. More so, I would say, than a lot of Aikido practitioners. Saying that all MMA fighters are chest-thumpers is painting with a pretty broad brush. It's kind of like when MMA types say Aikido is practiced by a bunch of mystic ki-faeries. It just ain't true.