Wrestling based:

Kurt Angle
Chris Benoit
RVD
HHH
Ric Flair
Shelton Benjamin
Matt Hardy

Simply because I like them:
Big Show
Kane
John Cena
Mick Foley

My lists quite outdated because I haven't been able to watch regularly for a long time> Basically, give me a match with any of the above wrestlers competing against each other and I'll enjoy it. For a great wrestling match, however, i'd take Angle vs Benoit every time. Rumble 2001, I think? When those two were against each other? Maybe 2002? Was an Awesome match. Angle/HHH at the rumble a while back was amazing also.