Is posting in a thread that hasn't had a new reply in 4-months tantamount to grave digging?
If so, I sincerely apologize.
As someone who may be schizoid (zero friends/associates, generally feel threatened by others) I'll tell you how I keep myself entertained.
You can really enjoy the outdoors (alone!) if you go ahead and buy a decent bike. I often go on day-long cycling adventures just studying my surroundings. Walking/running is too slow... you can't get very far. On a bike, you can go REALLY far to some obscure area and explore someplace new. It's also a good way to stay in shape. (Cycling adventures at 3am are especially fun!)
Just go do some research on a place like bikeforums.net. You can teach yourself basic cycling skills.
As for a rewarding computer hobby, you could try to learn to use Blender 3D (
http://en.wikipedia.org/wiki/Blender_3d), a free 3D modeling program. The learning curve is pretty steep, but if you get good you might be able to sell your models commercially (such as on Second Life).
Just a couple ideas to throw out there.