What did you manage to get it down to? Mine's been around 500 for some time now and I've tried to purge here and there, but haven't taken a deep dive into culling the list.
Around 100.
Axing stuff with no release date and no news updates were the first to go.
Then I sorted by date added and worked from oldest to newest. If it's been on my list for years, more so if it's a sequel to a game I haven't yet played, I removed it.
Then I removed stuff that wasn't unique. If it was "another one of those," like another indie boomer shooter or RPGmaker RPG, I axed them because I already have plenty I should try/play first.
The newest stuff, I axed anything I couldn't remember playing the demo. I look at the game in motion and reviews, focusing on the negative ones. If I found the negatives to be not something that bothered me, it could stay. If it's something that might bother me, it goes.
I figure if it's something I really wanted to play, it'll come back to me. Either from a bundle, a YouTube video, a reddit post, etc. The Media on games I consume is pretty good at sorting out what I want from what I don't.
Also, eliminate any duplicates I have on my consoles. I'll double dip if it's a bundle +1, but definitely not prioritize.
My personal top 10 wishlist are:
1) Cryptmaster - remember the demo distinctly. Nothing else like it. It's definitely on my list to buy.
2) Warhammer 40k Rogue Trader - I will get it when it's got a "GOTY" style edition; I love CRPGs thanks to Larian (divinity before BG3) and I'm a 40k fan.
3) Potionomics - the master edition update just came out. The things I wouldn't like have been removed or changed.
4) Dream Tactics - great game, unique premise
5). Romancing Saga 2 - loved the demo, want to get into SaGa
6) Kunitsu-Gami - just hasn't been cheap enough. This should have been a $30 game. Capcom screwed the pooch.
7).Neon White - unique premise, saw a video on it
8) Mouthwashing - demo was astounding, knew it was going to be a thing
9) Until Then - great demo, great vibes
10) Thank Goodness You're Here! - word of mouth is strong and seems unique
I prioritized games that are out now. I put all the early access and unreleased stuff at the bottom of my list since it's useless to track them. They'll arrive when they arrive. Most EA games that hit v1.0 these days worth a damn make the news sites and reddit, usually with a sale. That's typically the best time to decide to buy in or not.