I personally can't stand Rogan commentating, i like Coture much more (he's not great but better imo). Rogan just drives me nuts when he exagerrates things that are happening and cusses (cussing don't bother me but on a ppv or worse yet TUF finale when he did it and they had to bleep him quick with the couple seconds delay they have). Last night i got annoyed at both of them last night though and i can't remember what the hell it was they were saying. I'm sure i'll catch it again when i rewatch it today.
I'd rather take dumb calls, but called with enthusiasm over barely audible, baseless calls. Rogan has his faults, but to me, he's the best MMA commentator today. He's a huge fan, but at the same time a pretty good analysis.