I second what Jonathan Scott said about small pianos, particularly electronic keyboards. I have a pretty nice Roland keyboard, that I don't play very often. I have a couple of guitars that I play regularly -- a Martin D-35 and a Guild 12-string, both from the '70s, and purchased second-hand. Both are steel-string guitars. I had another Martin, a D-16 that I bought new -- I gave that to my son who has a very strong interest in music.
Probably my main hobbies are motorcycles, of which I now have five, all Harleys. A couple of them are pretty old -- 1946 and 1948. The other three are from the 80's, 90's, and 00's. At any given time, I'll have one or two of them apart, either for maintenance or to repair something.
During the warmer weather I like to go on backpacking trips. Where I live is ideal for this pursuit, as I'm very close to the Washington Cascade Range, and it's not too far to get over to Olympic National Park. The backpacking trips range from a weekend all the way up to 10 or more days, and up to 55 miles in distance. I don't mind sleeping on the ground, and don't mind eating freeze-dried food. The views I get are definitely worth it. I have a couple of friends who enjoy these trips, as well. I've done a few solo trips, but prefer to go with someone else, for safety reasons, and for the ability to reminisce with them after the trips.