May I not-so-humbly suggest: Airsoft.
(If legal in your country)It is a nice sport, with a little bit of something for everyone.
-Make friends. Airsofters are a merry bunch of weirdos. I could go to any town in my country, and I could call at least two dudes whom I've previously met at some nation-wide event, have a chat, have a beer, maybe even have a place to crash for the night, if bad comes to worse.
-War Games. Let's not fool anyone. When we were kids we had our plastic soldiers. Then videogames. Boys will be boys, and boys like to shoot guns. Now imagine you could shoot a gun, score a few "hits" and
not hurt anyone in the process. Great, huh?
From weekend skirmishes where about 10 guys gather in a nearby derelict building for a quick deathmatch to national events with hundreds of players, and further to international events with more than one thousand people.
-Cool rags. Surely you must have a hero in mind. Maybe you would like to "be" a part of the SWAT teams? An American soldier? Private Military Contractor? World War Two Russian infantry?
Or just go nuts. Be a zombie hunter, be part of the mafia, wear a pinstripe suit on the field, grab two golden DEagles, speak with a fake italian accent. Be a Storm Trooper. Be the Master Chief.
Whatever you wish for, you will find replica weaponry and replica equipment to match.
-Technical stuff. Are you a tinkerer? Good. Airsmithing is not only fun and educational but it can also bring you a lot of money. Good airsmiths are a valuable commodity.
-Collecting. Some of the more expensive airsoft replicas are so well made, you'd actually have to try hard to tell them apart from the real deal. Maybe your laws are not as "relaxed" as in some other countries. Maybe hanging a real assault rifle on your wall is not exactly legal. Then, my friend, check your local airsoft laws.
Also, as a bonus:
-You will obviously gather some gear that is priceless if you're into hiking, exploring nature, geocaching, and so on.
-You will learn how to use a map, a compass, or how to find your way around when missing said items.
-Like it or not, it will discipline your lifestyle a bit. You will
have to unpack your gear and clean your tools after a game, no matter how tired. That is, if you want them to look good and work well. Next thing you know, you'll just notice you take more care of your regular clothes and tools.
-You probably will get scratches and bumps, and maybe it will prompt you to get into some first aid classes...
-You will lose some weight, get some exercise, breathe some fresh air and see the great outdoors.
Last Sunday. Ten degrees below freezing point, wind, and a lot of fun.