Usually OoT for me. Every so often I’ll get an itch to play an older game, but OoT is always one I find myself going back to. MQ sometimes follows, but I find that I don’t play older consoles very often anymore so unless I already have the console set up for a game I’m dying to play, I tend to stick with what I have currently on the latest one.
Aside from Zelda, the Resident Evil franchise also often gets some of my time annually, specifically RE2 on the N64 or GCN (depends which console is plugged in), but like Vikze, I find as a not properly functional adult, that I don’t have enough time to watch and play all the things I want to anymore so I’ve started to become very selective. Only unlike Vikze, I’ll default to something I’ve already watched/played because I already enjoyed it and know that it’ll be worth my time.