Strategy games: Pick a strategy game, any strategy game. They're really fun, but they really don't get that much hype, unless "Star Wars" or "Halo" is on the label. Age of Empires, Total War, and Civilization are extremely great games. Quite frankly, I believe people no longer like to think while they're playing games. Adventure games (as in the point-and-click type, like Sam and Max) and classic games could also fall under this description.
Snoopy vs. the Red Baron: Yes, this is an actual game.
Edit: Also forgot to mention two games: LoZ: Wind Waker and LoZ: Link's Awakening. In the case of the former, it's rather underappreciated because "graphics aren't real so it suks!" type of attitude seems to be going around with some people, but the game is really fun. Ganon also gets arguably the best (and most brutal) death in the series.
In the case of the latter, the story is very strong, and the dungeon structures are nice - just about everything is nice about the game. Given it's not perfect, but it is one of the best games I've played.






