Of all time: Vagrant Story. I could go on for paaages as to why, but I'm a little pressed for time at the moment. Suffice to say, the game embodies everything I have ever looked for or enjoyed in a game. It's a perfect melding of so many amazing elements and concepts, and every single aspect of it stands out head-and-shoulders over pretty much every game I've ever played. Intelligent, sophisticated, complex, yet perfectly-paced and eternally replayable: Vagrant Story simply knows no equal.

Favorite relatively recent game: Beyond Good & Evil. Hands-down THE best game of the entire "128-bit" console generation.