The list is too long to name every one, but I have a few games I keep going back to after all this time. I played some of these 30 years ago and not only do they still hold up, they're comfy in a way that's impossible to get these days.

Might and Magic 6. I probably play this once a year or so and have done since I was in middle school. It's just the perfect blend of comfy and campy, and an overall great game to boot. Easily attainable through GoG.

Heroes of Might and Magic 3. One of if not the best turn based strategy game ever made. Base GoG game is fantastic and there are also incredibly well done fan-made expansions that increase the lifespan.

Wizardry 8. Lots of jank and very harsh on first-timers, but easily one of the best blobbers ever made once you begin to master its idiosyncrasies.

Tales of Maj'Eyal. My vote for the greatest indie game of all time, still in active development after like 15 years or something. The best tactical RPG Roguelike on the market and it isn't close.

Baldur's Gate Saga. Goes without saying.

Master of Orion 2. The peak of 4x games.

Fallout 1, 2, 3, NV. 4 is a pile of shit, but all four of these games are great for a variety of different reasons. People shit on 3, but I still think its world and immersive strength are fantastic even if the rest of the game is rather lackluster.

Daggerfall Unity. The best Besthesda game released in the past 10 years and it isn't even close. Morrowind remains a classic and Skyrim and Oblivion get way more hate than they deserve.

Breath of Fire III. Lots of people talk about the RPG greats of the PS1 but leave this one out. They are wrong to do so.

I really could go on but this is probably good enough.