Sean Sherk, Andrei Arlovski, Randy Couture, and Rampage.
Absolutely love watching those guys fight, they're the most technically sound boxers in MMA right now, although with Rampage he still has room to grow in that regard. It seems like the game is there with him, but lately he just hasn't been digging too far into his tool box. But, watching Rampage fight in Pride is what got me hooked on MMA, I loved his style, before that I was just a casual fan.