Ok, I might as well go first: I wish I could draw. Not at the level where I could make photorealistic portraits, but I've always been envious of those who are able to scetch something together in a few minutes that perfectly captures what they want to convey. Sometimes words aren't enough to express what I want to say, and for those situations I would love to have a simple drawing do the talking for me.
I bet you could find a class on it somewhere. Trade school or adult edu or even a local car club might have occasional offerings. This one is on my list too.
I could go to a community college around me (I know they teach it), but scheduling it around work might take some work. You know, I think I might actually look and see if they have an occasional weekend course. I don't have to be a professional welder, just good enough.
Home Depot rents out gas-less mig welders surprisingly cheap. You could spend a fun 3-4 hours noodling around trying simple welding of angle iron pieces!