Specifically related to videogames, I purged my entire collection years ago because I was spending more time researching and buying videogames than I was playing them and I had a big pile of carts and disks I didn't really give a shit about. Felt great, now I only have what I actually play or has meaningful, sentimental value to me, and I have a massive steam backlog to get through. I don't miss my old collection at all, but I find it hard to say no to arcade PCBs at this moment in life, especially if it's "a good deal". Sure, I could have that $150 PCB for $50 but it's a game I don't really like, they take up a lot of space and PCBs can give up the ghost at any time. I also hate selling shit to people I don't know, when I do it's usually a fire sale or I just give it away.
Semi-related, but I also find myself thinking about/picking up a random hobby. My brain's wired no good, I just get obsessed with random shit and either get exhausted and force myself to stop or spend money on stuff and end up never using it. This year it was miniature painting and I bought a bunch of paints and brushes and have painted exactly three minis. Model kits, airbrushing, carpentry, music, fishing, animation, you name it I've probably tossed too much money at it for what I got out of it. Like twice a year I have to talk myself out of grabbing a skateboard. The last 5 years the only ones I've really stuck with is mountain biking, gunpla (I have like 8 unbuilt kits to go through) and bass guitar (which I haven't even touched in a good while)