[Quiet Man Cometh]

If we're talking computer games, than Elder Scrolls. I started with Daggerfall, had Battlespire which refused to work, and *still* haven't bothered to finish Morrowind yet (I want to learn the theme on my flute) to say nothing of Skyrim.

I'd like to get Warcraft 2 back but I can't be bothered fiddling with DOS emulators.

Console wise, I will say Devil May Cry as it's the only video game I've actually bought a system for rather than the other way around.