As a newbie I have only used Mesquite, Apple and Pecan.
The mesquite because I had it left over from an old cheap bullet type smoker that is gone for a while now. The Apple came with my CS and Pecan I ordered on the internet.
When I used the mesquite it was on a brisket (long smoke). There was a distinct bitter taste. I won't be using it again, at least not until I feel like ordering more and becoming more knowledgeable about the combos, etc.
I love my Apple wood and the Pecan is now my favorite. I want to try Peach because that is what Myron D. uses and I hope its good if a pro uses it.