I'd be interested in knowing how much he contributes to the group creatively. I mean obviously Black Thought and ?uestlove contribute a lot, but I'd be interested in knowing about Hub, Knuckles, Kirk and Kamal too. To be honest I'm not crazy about Hub's solos, although most of my friends love them. As far as Kamal's playing? I don't know, I'm not doubting his skill, but I haven't seen/heard anything that really impressed me. Though one of the nice things about The Roots is that they're not stringing solos back to back, constantly trying to impress you with their chops. Although, I did notice a lot of different keyboardists during the RCMH show, but it was hard to see, I was in the mezzanine and the back of the stage was dark most of the time so I didn't really see who was playing what.