Never gas, always lump (!), never fluid (!!).
Starter chimney is a good tool, but lately I tend to use a propane weed burner -- though much smaller than the one in the vid Trelja links to! Small ones that screw on a plumber's propane tank can be readily found for 30 bucks or so. Great for starting (less messy and faster than chimney), and also for perking up coals that have died down (handy for me, since I often do larger cuts with indirect heat, and that takes time). Recommended, but observe all safety precautions!
Digital only, and solid state except for tubes in CDP. Guess my purism is local to grilling.
John