How come I’ve only played 4–5 games on that list and haven’t even heard of half of them?
I’ve heard many good things about Grim Fandango and I’m sure Morrowind and Oblivion are great (once I find time for them). Neverwinter Nights 2 is too buggy on my PC.
Other than those, my own list (depending on how addicted I have been to them) would include:
1. Frontier: Elite II
2. Might and Magic VI and VIII (as well as all the others)
3. Gothic (1+2, I still have not managed to play 3)
4. Heroes of Might and Magic (esp. II and III, never played V)
5. Quest for Glory (all 5, especially 1+2)
6. Master of Orion 2
7. WarcraftIII: Frozen Throne, partricularly the DotA map, which has been a game in its own right for several years now
8. Death Gate (an old DOS adventure game, real good)
9. Monkey Island (esp. 1+2). They are low on the list because they have annoyed me a lot. Would be higher if the only criterion was time spent playing.
10. Grimm’s Hatchery and Magic Farm (basically the same game)