As I mentioned elsewhere, my #1 hobby is being an armchair military historian, which itself splits into a number of sub-hobbies. The main branch is simulation games (and more recently wargames), through which I got into the whole thing. Lately, I'm particularly noted for playing games such as Falcon 4.0, Silent Hunter III, IL-2 Sturmovik, Distant Guns, Hearts of Iron, Total War series, Combat mission, etc. I have been involved in organizing major multi-player communities (like Wolves at War) of dozens of players, and even learning some basic programming for the sake of modding (which I did quite successfully)
I also read military history with a lot of interest, though history as a whole is a huge hobby. I even have a minor history - a shameless excuse for my hobbyism.
I probably spend 10x more time, money and attention on my simulation games alone than I do on anything anime-related (including AMVs)
Then there is the whole arts area, where I would actually pile AMVs into. I dabble in drawing, I dabble in playing music, I dabble in writing, I dabble in photography, I dabble in design - but I'm more of an active consumer for the moment than anything. Active listening to music and otherwise obsessing over it is probably my #2 hobby, below simulation games and above AMVs.
Then there is a huge plethora of stuff below it. Popular science and technology stuff - I'm there. Biology and environmental studies has been an area of interest for me since childhood, and I'm always within arm's reach of these things. In general though, being raised as a member of the weird species of Eastern European Intelligentsia, I have an interest in everything by default.
Lastly, there is the hugely underrated hobby I call Aimless Wandering. It involves going out on streets and walking around without any sense of direction or purpose. If you don't understand why this is satisfying... I guess it's not for you
