Here are my current favorites:
For beef: mesquite, red oak, red wine barrel staves, bourbon barrel staves (the barrel staves are white oak)
For anything else: pecan, peach, cherry, apple
All of the above can be found at Fruita Wood, with the exception of the red wine barrel staves.
Have tried the following and didn't really care for them: grape wood, mahogany, maple. Some others like them, but I wasn't crazy about the flavor profile.