I dont think he was a loud mouth but he had started to be a show boater. When youve proved your the best in the world over and over and have a guy whos been talking smack about you for months in front of you, losing to you I can see how guys could get a cocky and showboaty.
I think most people hated Rashad for the same reasons. I had a friend who played pro soccer, he said the guys say to each other on the field is crazy. You see people taunt and talk **** in most sports yet in fighting its you have to be humble or else your a dick. Everyone hates a show off but it gets under the other guys skin and can take him off his game which is why they do it. If they dont push the pace and all and play it safe and wait for the other guy is what annoys me.