This is a fascinating thread, especially as I can see vestiges of the problems people are having in myself, but on a much smaller scale. In my circle, people know me as someone who collects games, but compared to most of you, it's chump change.
I only started a little around five years ago(mostly because I noticed that I already had a fair collection from just buying games and then never selling them), mostly NES/Genesis/SNES/PSX/Various GB games, and mostly just games I might actually want to play. But then I began collecting a bit more as I found better deals in game shops, and would sometimes snag games that I'd probably have no interest in just because they were cheap and I was eager to pad out my collection. Which to this day, is still only around 270 games for every system.
After I lost my last job, however, I put an end to that for the most part, and probably will keep relenting until I get caught up financially. Although just as well, I've tragically found myself playing games a lot less, partially due to being busy with work and being a bit too bummed to drag them out, preferring to spend time socializing. I still have a terrible amount of games I haven't beaten or even played, and that's even more incentive to lay off hunting for a while.
Funnily enough, one of the reasons I recognized the growing problem so quickly was because I've done the exact same thing before, but worse.. With books. I loved books, so I collected them.. And then the local town book store closed down, and was selling books for 10-25 cents each. I literally bought around three hundred and fifty of them. I also bought a bunch of cheap used library books afterwards.. And a few dollar store novels. And as much as I had read in the past, I had slowed down, and then came to realize that many of the books I bought I hadn't even wanted that badly, or at all.. Some of them I might never read, I was just buying for the sake of a big collection. And now that I'm no longer living alone, storing them is a pain.
Fortunately my game collection is much less of a problem, just a few stacked boxes of games, no extraneous or duplicate systems, etc.. But at the same time, had I been less smart about it, it could have become the same issue, if not worse.
That being said.. ...Well, I'm not sure what my point was, other than "I'm glad I was forced to quit while I was ahead". Granted, once I get back on my feet financially, I plan to start collecting again, but I plan to do so tempered with the lesson this has all taught me. I don't have any desire to own every game for a system anyway, I just want a nice collection of games I can enjoy, so I guess I just plan on "collecting smarter, not harder". There's still plenty of used game shops where I live, so the thrill of the hunt is still awaiting my eventual return..