I am a huuuge board game nerd. Love them and have a pretty nice collection building that is admittedly mostly still party style games but I'm working on it. Party games are easier to buy for me just because they're usually cheaper and also are easy to get to the table with anyone including non-board game people.
Catan is still probably my favorite. I've played it the most and it's easy to get to the table because of how well known it is. Codenames is probably my favorite party game at the moment. Favorite Co-op game is either Forbidden Island (haven't gotten a chance to play pandemic yet *sad*) although Sherlock Holmes Consulting Detective is up there too, just way harder to get to the table. A game I just discovered recently that I am enthralled with is Escape From the Aliens in Outer Space. Super fun and tense and the multiple maps makes it super easy to have a different and unique experience over the course of multiple playthroughs.
Also, controversial opinion but not really a fan of Munchkin at all. Admittedly only witnessed it played and never played myself but it just seems like a game that is just the bargaining part of Catan and that can often be the most frustrating part depending on who you're playing with. So maybe if I played with the right people I could enjoy it.