This really depends on what flavor profile you’re looking for. Lighter smokes come from fruity trees, like applewood and cherry. These are great options, and if this is your first time smoking anything, I recommend picking one of them. A stronger, more intense smoky flavor will come from hickory or mesquite wood chips. These are also great with turkey, but can be overwhelming if you use too much. If you're going to use hickory or mesquite wood chips, only replenish the wood chips during the first hour of the overall cooking time in the smoker.