the cliché stuff, like movies and reading. I also like travelling. I love my dogs and do a few activities with them. School was my hobby for so long. I feel so lost without it I am seriously considering going back to tack on a certificate or something to my bachelor's. I must be crazy! It will keep me busy, but won't really give me much social fulfillment. Most students are younger than me, I enjoy class discussion with them, but not really hanging out outside of class.
for hobbies, i find that if i dont have something to contribute to the hobby, i wont feel much fulfillment from it.
for instance, i like to keep fish. aquariums and everything that goes on in them interest me.
now, i could just keep fish and be happy that i have pretty fish tanks. but... thats not really enough for me. so, i experiment and i post up the results of my experiments online on aquarium websites. i have forged some close friendships from this.
for instance, i know that i can collect live food for fish from water treatment plants. i know that i can go to a water treatment plant and collect several pounds of live food for fish in just a few minutes, for free. that means that i really dont have to pay for fish food if i dont want to, and its the best food you can get for ornamental fish.
some of the people in the hobby really appreciate that information. so, my attributions mean something.
so, do you like gardening? carpentry? remote controlled cars or airplanes? exercising? you could even turn personal development into a hobby...
you just gotta get excited about something.
right now i have a project going on where i am trying to raise a fish that nobody on earth has ever been able to raise in captivity before. its an ongoing process, and i may never succeed, but the constant discussions online have put me in contact with a lot of prominent people...
i have even had a few magazines ask me to write an article or two.
personally, i think hobbies are awesome. they are even better when you have someone else to share them with.
the thing is, if you try to come up with something new and have a community that will appreciate your contributions, and you actively try to make contributions, your social life will take care of itself.