My biggest one right now is music. I recently started taking some guitar lessons again (my first lessons since high school). It's been a great motivation to bust through some plateaus.
It's been a big encouragement too to pick up some other skills - I've been getting into recording and DAWs and even have done some (very noobish) video production.
I was really inspired recently by Ben Levin's music channel, so I cribbed a format he used for a few videos, and recorded myself playing a solo and then did some after-the-fact analysis on it. I really like how the video came out, although there a million things to improve upon, especially in terms of audio quality. (That video is here if that sounds interesting to you: https://www.youtube.com/watch?v=R2FkjeOXchc)
I have always had a (bad...?) habit of picking up and dropping various hobbies - I love learning new stuff, and I really love how quickly you can get the first 70-80% of a new skill. Over the past few years some of those have been cooking, fishing, weightlifting, and writing. I'm not super active in any of those right now (though I really need to get back on the wagon with lifting and exercise).
Oh, also - pinball. So much fun, I could bang quarters into those machines all day long. One of these days I'll have a table in my house...
I also have three kids, one of whom is a baby, so my time for multiple hobbies is basically nil. I'd love to find more time for all of them!