I like earl's for the supreme confidence of it. It's not just the stroke itself, which is smooth. It's the one-two-swing sequence that makes it nice to watch. He never looks like he could miss a ball even when he does.
Efren's rollercoaster motion during his practice swings is hypnotic, even if violates some pool textbooks. It's the opposite of the mechanical pausing robostroke you see from a lot of younger players with perfect fundamentals. They seem to drive or chop into the ball while efren actually seems to slow down on his final swing. He's definitely a spin guy instead of a speed guy.
Larry Nevel's is just sick, smooth and powerful.
I'm liking Kim Davenport's from what I'm watching of it right now on the live stream.
Two strokes that work but I don't like as much:
Alan Hopkins - short bridge, jabby stroke. Gets the job done anyway.
John S. - One of my favorite players, and has amazing position skills. Obviously shoots 'straight as a martian' to paraphrase earl. His practice strokes are quick and choppy, but the final stroke has good follow through. Still, it looks like he 'worries in' the ball sometimes.