Very good
. Franklin uses all or nearly all oak, and barely mentioned other hardwoods. If you use softwoods or pine, you should have your smoker confiscated, or turned into a gas grill!
In his good smoke/bad smoke chapter, franklin talked mainly about black or dark smoke vs. thin blue-white smoke and how to vary fire temperature and air flow until the smoke is good. Just how to do that depends on what smoker you use and how dry or wet your wood is. He says he only buys wood from trusted suppliers, and never uses kiln-dried wood. It can be hard to get a useful take-home lesson from that.
Yes, I also use a similar remote thermometer. It was essential when I was first learning.
Texas tastes in brisket seem to lean toward plain rubs and little or no BBQ sauce. Tastes vary. It takes all kinds to fill the freeway.
I found brining a turkey before smoking or roasting it made it easy to get a good result.
If you use all mesquite, does it burn too hot?
I find smoking with hickory or oak in a Weber smoker makes for a bitter creosote-like flavor. I've read (but never tried it) that hickory or oak should be first pre-burned (essentially turned into charcoal) before exposing uncooked meat to the smoke. In my Weber smoker, I use lump charcoal for heat and various woods (apple, cherry, or pecan) for flavor. All wood and no charcoal would make it too smoky. Apparently, in larger off-set smokers, all wood is favored.