I honestly don't know why he chooses the solos that he plays.

I don't remember him ever playing Bad Name, but I've seen him play Runaway and the outro solo to Sleep (I think is mostly ad lib). Neither are the hardest, but not the easiest either.

He has a unique style which has gotten so much better over the last couple years. Much like Bruce, it is painful to watch, but if you close your eyes, I think it sounds pretty good... certainly better than he looks.

I doubt he could play Wanted. I bet he could play Prayer though.