My personal favorites. Spielberg is my favorite. But here's my list in no order.
Steven Spielberg
George Lucas
Martin Scorsese
David Fincher
Ridley Scott
Peter Jackson
James Cameron
Frank Darabont
Christopher Nolan
Sam Raimi
Robert Zemeckis
Joel and Ethan Coen
Tim Burton
Alfred Hitchcock
Michael Mann
Jonathan Demme
Irvin Kershner
It's a pretty predictable list, I know. I'm a thinking man when it comes to film. I analyze it inside and out. Every frame, shot, bit of dialogue. And I like that. But when it comes to choosing favorite films or directors, I follow my heart. What stays closest to me and will reside with me for years to come. And those directors and their films touched something in me that I've been more than fond of. These guys are the ones who made me want to become a filmmaker. When I'm done watching their films, I say to myself, "Damn, I hope I can make a film like that someday." Because I love everything to do with film. So these are the guys I thank the most. Because without them, their films, Jesus, I would be on the couch watching Sunday football.