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.
Tuning a musical instrument by ear. I have tried to “train” my ear and all that but no dice. I can play well enough but if stuff goes out of tune I have no idea until I check it or someone tells me