I, personally, never "got" the appeal of (among others) Jeff Stryker, Jake Andrews, Max Grand, Matthew Rush, Colton Ford, the Rockland brothers, Jordan Young (the #2 most overused bottom girl in porn), and Chad Knight (the #1 most overused bottom girl in porn).
I'd have to say my favourite pornstars are the ones with the biggest dicks. Lord, I'm such an awful stereotype, ain't I?
My all-time fave pornstar was Brad Hunt (anyone?).
Other favourites that come to mind (in alpha order):
Mike Branson
Jim Buck
Chris Champion
Rex Chandler
Sean Colby
Jason Crew
Cody Cummings
Casey Donovan
Tag Eriksson
Cory Evans
Dean Flynn
Cameron Fox
Adam Grant
Troy Halston
Jason Hawke
Johnny Hazzard
Matt Hughes
Chad Hunt
Brock Hunter
Brant James
Trevor Knight
Jason Land
Joe Landon
Barrett Long
Clay Maverick
Mark Miller
Paul Morgan
Mike Nichols
Kip Noll
Jeremy Penn
Logan Reed
Mac Reynolds
Lee Ryder
Ken Ryker
BJ Slater
Mark Steel
Colby Taylor
Ettore Tosi
Alex Wilcox
Sean Williams
Ryan Yeager
Kurt Young
Ryan Zane