Davecazz Naquatic Scinfu (dark hill dev) i feel like i'm forgetting some, but really just any dev who is active in the forums and receptive to suggestions.
Phil Hassey, maker of Cosmic Nitro and Galcon John Kooistra, Blue Defense and Blue Attack developer ThomasP here, the artist of Rune Memory is pretty cool too.
I would have to say CommanderData is my favorite dev ---- he is so involved in the TA forum and his own. He is very active and he listens to the people who playes his games to make the experience that much better. All I gotta say.
I'd say Commander Data of RogueTouch. I get the impression that he just loves hs job, and enjoys playing his game as much as making it.
That would be my choice as well, there's tons of great developers but he made my favorite game and you can tell it's a labor of love for him. Can't wait to see what other kinda games he makes in the future (rumor is him and Scotopia got something brewin, very interested!)
Gotta throw Paul from Tag and the whole crew in as well, its a real crime that CJS isn't selling better yet!