the amount of games that I would purchase without hesitation I can count on one hand, with anything else, there's always that thought that creeps up: "yeah, but it COULD come to gamepass." And so I wait. The only time I allow myself to buy games that ARE on my wishlist is during Steam sales.
so yeah, gamepass has coloured how I shop for games. it's definitely made me more conservative, allows me to exercise discipline in denying myself immediate pleasure, and I'm someone who prefers to wait for games to go through all their patches and expansions before delving in.
games that I'd day 1, off the op of my head: Hollow Knight 2, Returnal PC, Bloodborne PC. Yep, I guess I only have 3 at the moment. Anything else, wait to see if it lands on gamepass, if not, wait for a big sale. go enjoy your other hobbies.
What I find more interesting than the question "do you like gamepass" is "do you buy the game separately if you end up liking it on gamepass?" I'm sure I'm not alone when in saying that I mooch gamepass from a family member (nephew console gamer), much like one mooches for spotify/netflix/other subscriptions. I have found that if I really enjoy a game, I'll buy a copy on Steam, or DRM free if available. I was happy to, and this only happened when I found Unsighted.