My favorite judges are Marc (he's adorable), Amanda (same), Maneet (love her voice, and her critiques are always good), and Chris. I like his direct approach, even though he always gets the hair, or something left off of his plate.
Alex is always good for a convoluted metaphor, and she can give the stinkeye like nobody's business. I didn't used to like Marcus, because he always seemed so serious. But his critiques are always good and helpful. And he was featured on NPR's Fresh Air one time, and I happened to catch it in the car a few minutes into the interview. I knew right away from his voice who it was. It was a great interview.
Least favorites are Geoffrey and whatever substitute judges they have, usually.