All this talk about the asteroid hitting the earth...I live just a couple mountains over from the Yellowstone Caldera. If it ever blows, I hope I'm outside to see it. That would be a pretty amazing sight to take into Eternity.
As for hobbies: Besides fish keeping, my time tends to be spent in attempting to kill animals (preferably with a fly rod or with primitive archery gear that I build myself), cooking and eating them (venison is delicious and healthy!), playing Irish and Scottish trad music, trail running, reading, Bible study (is that a hobby?), building assorted things, having good conversations with friends, and reading (preferably history, historical fiction, and stuff about plants/animals/ecosystems).
I'm also really good at breaking things, then figuring out how to get them working again. And lying around. I dabble in martial arts, but my heart isn't really in it because I have a black belt in running away. Sometimes, you just have to play to your strengths.