I picked up a craftsman hand impact driver couple days ago. Vital for getting the torx bolts out of Volvo heavy trucks on the upper radiator hose elbow at the engine, if it has a Cummins ISX. Things are like welded in.
Charger for my small batteries, 5/8 magnetic spark plug socket I use for Cummins cng engines, sae flare wrenches, and used 3/8 long handle flex bent ratchet, which I got for $75 with a new grip off the truck
Re: "Whats your favorite tool and why?"
Do those smash your knuckles against stuff when they suddenly get the fasteners tight like air ratchets do in tight spaces or do they breakaway somehow?