Yeah, his BJJ is ridiculous, and his stand up has been ever improving. There aren't a lot of up and coming Middleweights out there, it seems, so someone of his caliber could really spice up UFC's division. I do love that he's the champ for Strikeforce at 185 though, hence the sig.
My all time favorites are are: Fedor Emelianenko, Mauricio Shogun Rua, Quinton Rampage Jackson, Wanderlei Silva, Royce Gracie, and Mirko Cro Cop
Lately, I've been liking: "Jacare" Souza, Pat Barry, and Junior Dos Antos