About 15 times at least. Went from stick burner to pellet, to another pellet, to yet another pellet, to charcoal bullet, to stickburner, to insulated cabinet, to drum, etc, etc.
Now I have pellet, insulated cabinet, and drum. I have to admit many times I'm thinking hard just to come up with something new to get them out. After you run through all the normal stuff while learning, it never quite has the same feeling as it did in the beginning.
Sucks, but just the way it goes. Maybe try something other than pellet for awhile to re-invigorate your interest.