Ham radio. It's a lot of fun and has something for everyone. I like the outdoors, so I took my portable gear to a park and operated Parks on the Air today. There are all kinds of digital modes for people who love computers, there's morse code, there's using kites to hoist your antenna, hot air balloons, talking with the space station, etc. All kinds of stuff. If you're the least bit nerdy, it likely has something for you.
sailsperson