Mr Morale. I'd go so far as to say he regressed as a rapper during this era. There are some great rapping moments on there like Father Time and the intro but overall I personally felt it was a step down. Going from Heart V to that, rap wise, was rather concerning to me. Not a terrible album by any means though.
I'm glad this era is over and hope we get a return to him rapping. I don't need the Kanye-like impromptu shyt, where it feels like someone is saying "the crowd is gonna yell this so loud on tour."