My favorite is the art direction in pre-rendered games.
Even if a modern 3D game have better real time graphics, I will find the old static angle more charming to be looking at.
There is always an artistic component into the fact that the developer wanted you to see the screen at THAT specific angle, and I find this much more "beautiful" than any real time graphics where you see only what is in the overall direction you are looking.
It adds to the game another layer, now it is a game AND a book of illustrations from the director of the game.
This, of course, is more for the 3D pre-rendered games. As well as pixel art (8-bit, 16-bit, modern, the game boy advance style...) the pre-rendered style also have some sub categories of its own: 3D (like Final Fantasy 7, 8 and 9, Resident Evil 1, 2 and 3, Dino Crisis, etc.), isometric (Digimon world 3 and Diablo) and sidescroller (Megaman X4, 5 and 6).