arena
daggerfall
redguard
battlespire
morrowind
oblivion

The dwemer puzzle box. The most memorable quest ever. I probably spent a full hour searching. It was awesome. That's the spirit. Lost and clueless, in a mysterious labyrinth, looking for something you don't have any idea what it looks like. That was the golden era before the stupid arrow that plays the game for you while you're just watching.

I'm not being specific, because there are so many good quests, but I really liked those in MW where you have to heal people or recover artifacts.

I will always love traveling to the Urshilaku camp for the first time. I just love going to Mar Gaan and getting directions, spending the whole day walking through the Foyada and spotting the shipwreck, going around the ruins, and climbing over the hill to see it there. Because you've just discovered the real reason you've been sent to Morrowind and that's spinning around in your head in you're trying to figure out what's going on. I just love how strange and foreign it feels. And that's the moment that the plot really starts to pick up and you're forced to start piecing things together.