When it was "his team" in Orlando he busted his butt and played with passion. Then he was at odds with management, had his coach fired, skipped town, was the laughing stock of LA and the league before landing in Houston where he has played 2 forgettable seasons. He blocked 1.3 shots per game this year which is the worst that he has ever had in the NBA over an 11 year career. His 10.5 rebounds was the lowest since his rookie year.
I also think it speaks to his mentality that he shot 67% from the free throw line as a rookie (he took 5 shots per game, so it was a good solid total). He has never been close to that mark since.