Cool is a matter of perception and whatever makes you happy :p
I think sport can be very rewarding, especially if its just running around the block. Theres an art to slowly getting better and pushing on through the pain and stress, i find an almost deeply satisfying philosophical element to it (any of you surprised that this is comming from me?).
Could try: Martial arts, sports/gym/ LARP (bit geeky but looks fun, never done it, google swordcraft/learn a language/learn an instrument/juggling/learn practical skills (cooking, camping, etc). Also check out the book "500 things you should know", you can find it on any good book store website (or on google).
The real trick here is just to keep trying things...