Baldur's Gate II: Shadows of Amn

The Good
BioWare's Infinity engine does an excellent job of taking a basic, straight-forward role playing system and turning it into a vivid experiance, with the role of the game master replaced by the computer. A variety of treasures (spells and items), an easy character creation, and a lot of possible quests and errands (which change after restarting the game, with appr. eight possible paths) make this game replayable and fun.

The Bad
The game's music is repetitive and monotone. There is only one battle music, only one travel music, etc., and after several minutes of playing you'll open your favorite .mp3 and ignore the music entirely. Additionally, whenever you restart the game you have to do a tedious starting sequence, which is used as an "advanced tutorial" and bores experianced players.

The Bottom Line
Even if you don't like role playing games, try Baldur's Gate II- you can either play it as a slash and hack game or as a roleplaying game. It has a huge replayability factor (even with the annoying starting sequence) and the entire experiance is F-U-N.