When I gas weld, usually no gloves unless it is a large joint (seldom). TIG always, for the above reasons, primarily UV protection. Stick, always, ready to grab the hot whatever and manipulate it. Just an old habit. (and UV), Gas burning, left hand only. That glove shields from the heat, and leaves the operating hand (I'm a rightie) free and sensitive to torch movement. MIG, mixed....left hand only most of the time same reasons as gas burning, but if I'm at it all day, or the work has to Be moved.....I'll wear both. I'd say on average, more often than not, but not always on both hands.