Re: what is the Funnest Hobby You've Gotten Into?
One was 5-Color Magic. This was a midwest phenomenon with some ties to #mtgwacky that made competitive MtG fun again. This was in the Urza/Invasion block days, so a MILLION YEARS AGO, and that was a tough time for competitive MtG. Card inflation had made tuned decks just crazy. Adn for folks into environments like what-is-now-Eternal-and-Legacy it was crazier. Turn 1 kills were easily achievable.
The essence of 5-Color was: Your deck had to have at least 250 cards in it. It had to have at least 18 cards of each color. You played for Ante. IT WAS AMAZING. The smallest game between buddies could matter, depending on what ended up in the Ante pool. You might lose the game, but feel like you won because you managed to Jeweled Bird your dual land back into the graveyard on the last turn. Cards were routinely windmill slammed, Chaos Orbs were dropped, and The Most Broken Card Of All Time was a 4-of in every deck. CONTRACT FROM BELOW. And the game worked. It was crazy and awesome and I will never forget it.
The other hobby I love is Ultimate Frisbee. I am a terrible exerciser--I need a competition to feel like I am doing something. And Ultimate is just right for me. Non-contact, no refs, insanely aerobic, and you learn how to throw a Frisbee in totally impressive ways. Codified above all other official rules is Rule #0, called "Spirit of the Game," in the parlance. Players should be having fun. If you are not having fun, you are doing it wrong, and should take a break.
I am still playing now, 18 years on, and loving it. If you can commit to showing up twice a week for say, five weeks, you'll love it too.