It's gaming for me. Video games specifically, though if I COULD do tabletop games / board games / whatever, I would, but there's nobody to do those with.
Mostly, I'm a PC gamer, so if I'm buying something, it's probably from Steam or some similar shop.
And.... ugh, yeah, I cant resist when I see something I want. Not just on Steam though; if I'm at an actual store, or if I'm at an anime con, these purchases will still happen.
What makes it worse... or just more absurd... is that there's enough money for me to do basically whatever in the heck I happen to feel like doing at the time. I'm not like, running around buying helicopters or some damn stupid idea like that... no, not THAT insane amount of money, but for purchases that arent made of crazy, or for things like travelling to anime cons (or whatever), I can do what I want.
Because of this general lack of limits, I'll buy things WAY TOO FREQUENTLY. Or for amazingly idiotic reasons.
My 3DS for example. Did I actually want one when I bought it? Nope. Had I thought about it at all? Nope. What happened was I was at an anime convention, right, and I was in the vendor hall. I had brought a huge blob of cash with on the trip, to buy things in there. But there wasnt all that much of interest at that particular con. Logically, this should have been fine... plenty of other cons I go to, I can buy loopy stuff from those. But no, THAT would have made SENSE. Instead, possibly because of caffiene, I had this idea: "Well I'm carrying this around, clearly that means I need to do SOMETHING with it". A 3DS and a couple of games were at one booth I passed by, and I figured "hey, that's expensive and plays games, I'll buy that". And so now I have one.
And that's the kind of decision making.... or total lack thereof... that goes into it. It's not infrequent where I'll buy some game or whatever, and then the next day I cant remember what it was.
Real brilliant, eh? Ugh. Never been able to really stop myself from doing this sort of thing. Lack of a spending limit makes this just keep going, and going...