Well, guitar was the main one. I intended to play when I bought my first guitar (an acoustic) 5 years ago, but I never did play it very long, so I ultimately regretted not sticking with it. Then I was going to pick up guitar playing again 2 years ago, but my acoustic was too loud for my apartment complex, so I bought an electric because it's quieter when not plugged in. Then I did nothing with the electric a few months after I bought it. Now I'm finally playing it and getting used to it. I'm taking lessons as a motivator because I really want to do it, but I don't want to give up again out of frustration, if that makes sense. (I never did lessons before this. I was trying to teach myself.)

Other than that, not really. I've never been someone who tries new things, so there isn't anything specific that I regret or didn't complete (besides the guitar). But now I'm trying to do new things.