If you're looking for an indoor hobby, a recent favorite of mine has been controller and console modding. Opening them up, soldering in LEDs and the occasional mod chip... I'm currently wiring an accelerometer into a 360 controller to give a sort of artificial sixaxis support. Of course since I'm an engineering major, that's the kind of thing I find entertaining and relaxing.
If you're looking for more outdoorsy activities, camping has always been a favorite of mine. Again, I'm biased for having been a Boy Scout. Swimming during the summer is always great, and biking (mountain or road) is a great way to get out in the winter.
Long ago, the '90s Nicktoons lived together in harmony. Then, everything changed when the century turned. Only Avatar, the best of the 2000's Nicktoons, could save them. But when the channel needed it most, the show finished. Four years passed and Mike and Bryan created the new Avatar: Legend of Korra. And although the show itself is great, it has a long way to go before it can live up to The Last Airbender. But I believe Korra can save Nickelodeon.