So agreeing with this thread. I've gone through too many hobbies. Spent WAY too much money in each. From photography (both film and digital), to guns (all sorts), to bikes.

With photography, GAS (gear acquisition syndrome) is real. Best primes, widest, clearest lenses, more pixels, tripods, etc. Although not anywhere near as much as before, I still get the gear on my vacations.

Gun? Jeez. You might as well be burning that money. Unless you're plinking with 22LRs, you're just going through money. Friends ask "Why don't you take me to the range?". Because it costs an arm and a leg each time! Not to mention scopes, mounts, aftermarket triggers/barrels/stocks, and that cost of ammo!

At least with a nice bike and initial purchase of accessories, it's just a matter of tubes, tires, chains, and batteries. Cost me hardly anything to ride. (then again, food and beer costs after the ride)