I play through the entire Quest for Glory series on the pc every so often. The first game came out in 1989 I believe. QG1 was my first real fantasy game (although I played the ancient ASCII-graphical Castle Adventure before that) and the nostalgia keeps me coming back.

I do a playthrough of the Zelda games from time to time.

I also decided to take up a quest over the last year or two to go back and play a lot of the great games from the past that I missed. The Monkey Islands, the early WarCraft games, and a few others I have played are more than ten years old.