I think Achievements are useful if they're tracked separately by each save game. Minecraft does this, and I find it helpful when I return to a world save after a long time because I can use the achievements I unlocked to help remind me what I was doing and resume from there instead of looking at what clues may have been left behind.

I love New Game + mechanics. I think it's a travesty more games don't have them.

I hate excessive collectathons or overly repetitious cutscenes or dialogue. I love TotK, but the end-of-shrine bit got old real fast; I found myself missing pre-BotW heart container hunts where they could just be in a chest somewhere. I also feel exhausted just thinking about all the Koroks; I like trying to 100% save games, and the Koroks start to feel like work after a couple hundred in total.

I like when fps weapon recoil moves the player view with the recoil, particularly if the view resets back to where the player was aiming as the recoil cooldown ends. It's satisfying and also gives the player an odd feeling of agency because the recoil mechanic lets them play "can I control the hose?"