I wishlist every game that looks like it has potential; check it every couple weeks to see if there's any 90% off deals. Pretty much don't bat an eye at anything below that.
I have that disabled or blocked. I don't check my email all that often, and most of the alerts I did get were below the purchase-worthy discount, so it wound up just being a lot of spam.
You can't possibly have an interest over so many games, it's not practical either. Even if you finish 100 games every year 2000 games would take 20 years.
To be honest, I'd probably call it "awesome" and be a bit envious. That must pretty much be a state where whatever mood you're in, there's always going to be something you want to play, like someone with an amazing collection of vinyl records, or bookcases full of literature & poetry.
Those are some pretty big numbers on hours played too, so it's not like you've just played each thing for an hour and then chucked it.
I only feel mine's out of control because of the relatively small amount of time I have to play these days, and the amount of unplayed games - I can play a new game every week for about three years, but actually I just stick another ten hours into "Crusader Truck Manager Fortress Rally Tactics III", on average.
I use isthereanydeal for buying any game and my list is HUGE. I don't buy anything until it's massively discounted but my library is way bigger than anyone I know because they buy everything for $60+.
About 20 something games. I usually go through whenever I add new things and delete things I'm not interested in anymore. Most of my wishlist is either early access stuff I'm watching reviews on, or stuff not out yet.
Same, if I don't want it when it's 5 bucks, I won't want it when it's 30. If I for some reason change my mind, then I'll just go back and find it again.
Honestly, I don't see the need for a wishlist larger than ~100 games. You likely aren't going to buy all 100 games. By the time they release or go on sale or whatever reasons you didn't buy it but instead wishlisted it, you'll likely have moved on and not feel the same excitement when you see it again. So what's the point? Why even have a wishlist if it's not intended for you to actually buy all the things on that wishlist.
Tell me money is not an issue for you without telling me money is not an issue for you.
My wishlist is a 'remind me to check for sales' list. I don't care if a game is 20 years old, it's still a good game. I just care that I cannot afford 70$ for it. The larger the list, the better the chance to find deals.
Interesting for you to assume that since I literally mention sales (I don't buy games outside of sales at this point.) No, in fact, I just feel time is more of a factor than anything else. I don't play the 40+ hour games anymore because they typically aren't interesting or worth my time.
I find that when the winter sale rolls around and something I thought I'd like is in it I find out that I really don't want it anymore. That I would be happier with something else. So instead of increasing my wishlist to 1000+, I am really stingy and realize that I will just pick up whatever looks good during the sale rather than looking at a huge list of games that typically no longer interests me.
Are you trying to wishlist the whole platform, I'm at just over 300 but that's really pushing the wishlist (It would be larger if they had things like Movies that you could purchase on the platform)