Cosplay- I am a big movie nerd, and love movie props, scifi and fantasy armor and weapons specifically, and making them is so cool to me. Beyond that I do community events (kids hospital visits, parades, star wars nights at sporting events, museums, etc) and interacting with kids who genuinely believe I'm the character I'm portraying is loads of fun, and seeing their smiles is a fantastic feeling.

Tabletop games- for war games I'm actually more into the painting aspect, it's so relaxing and cathartic, to put on an audio book or podcast and just paint for an hour or two is a huge stress relief, and now that I've gotten into DnD, the creative aspect. DMing is loads of fun as well. I keep a small notebook on me at all times now to jot down ideas I have throughout the day, even if I don't use them, it's still nice to get the ideas out and have them available for later.

I've gotten into 3d printing as a result of the other two hobbies, and it isn't particularly fun, but is an incredible tool, and so I would consider it fun because of the output. I can start with an idea, and for a few dollars and hours I can have a new prop or mini without having to put on pants or leave the house. It's the coolest thing.