Okay, okay. Here's a list of my favorite fighters per weight class:
Heavyweight:
Junior Dos Santos
Big Nog
Roy Nelson (

)
Fedor
Andre Arlovski
Shane Carwin
I loved Napao and Cro Cop back in their heydays.
Light Heavyweight:
Rashad Evans
Forrest Griffin
Ryan Bader
Jon Jones
Lil' Nog
Brandon Vera before he started to get lazy, too, was great.
Middleweight:
Anderson Silva
Yushin Okami
Sexyama
Alan Belcher
Tom Lawler
Cort Mcgee
Nate Quarry for eye candy.
Cyborg - if you're counting women's middle with men's.

Welterweight:
GSP
Jon Fitch <3
Matt Brown
Koscheck before the Ultimate Fighter show (Douche!)
John Hathaway
Dustin Hazelett (Needs a better chin.

-- but who pulls off flying ankle locks anymore?)
Anthony Johnson
Cris Lytle
Karo Parisyan, back in the day before his Vike addiction.
Paulo Thiago (anyone else think he looks like Franz Kafka? Hah.)
Nick Diaz
Lightweight (and littler):
Kenny Florian
Clay Guida
Jose Aldo
Matt Serra
BJ Penn, back in the day
EDIT: AND KOREAN ZOMBIE. I need one of those shirts.
And if there's any Black House fighters fighting, I usually root for them ... because I am a sucker for a Brasilian man.