Diemer's a great choice!
Personally, I like Nigel. He's opinionated, sharp, and doesn't care for chess idiots. That makes him interesting.
My own choice is the troika of Topalov, Cheparinov and Danailov. They brought the world championship into disrepute simply to attempt to win off the board. Toiletgate was one of the worst instances of poor sportsmanship ever seen in a world championship, and that takes some doing!
When Topalov played Anand for the title, just about every top GM volunteered to help Anand. Topalov received the aid of the Bulgarian government, Railich (the creator of Rybka), and his paid seconds. To the best of my knowledge, nobody volunteered to help him.
Vasily Ivanchuk stated in an interview that Topalov is the least liked top GM on the circuit and then listed his reasons. He even hinted that Topalov cheated at San Luis in 2005, which is why he was so quick to accuse Kramnik!
Oh why? Tal has forced so many players to resign and
Bobby .... just because he is Bobby - "Sac, Sac .....Mate"
(just noticed the why after i hit "post comment")