I smoke only with mesquite because I prefer it for flavor with beef & chicken and it's free while camping by the truckload. I don't like it for pork. I'm going to brine some Buck Board Bacon pork and ...
Pecan makes an excellent smoking wood for pork. Similar to Hickory but a little lighter and sweeter. Down here in the deep south we use mostly hickory and oak due to availability, some pecan wood is always a treat.