Oh wow....
I've been an airplane nut all my life, so I still build model airplanes...both the small plastic ones and radio control types. In fact I've been working in the UAV industry for the past 20+ years.
I also play music, specifically rock music and a bit of country rock, in a band, although its getting harder to get together because we all have other stuff going on. I play bass, btw.
Airguns. I love 'em! I have some nice "adult" airguns and some good old BB guns. I don't shoot them too much anymore.
Powder burners! I used to shoot real guns quite a bit before I had kids. Then I had to quit and raise 'em with my wife who used to go out shooting with me and my friends.
My favorite was my S&W Model 57 which I used to make reloads for...but she's long gone..sad. Anyway, the wife and I are back into shooting full on and she's a pretty fair skeet shooter I must say.
So I guess it could be 3 hobbies although they could be broken into sub-hobbies, but we wont split hairs.