I don't think I've ever played a game that offers a story as intricate as Planescape. The basic question of the game is really interesting and it makes you think about how you would answer this question yourself. The different characters, both NPC and party members, were the big highlight for me. In general, I loved the dark mood and enjoyed every minute of exploring this crazy world. Combat wasn't necessarily much fun, but it can often be avoided through clever dialog. Definitely a game for my all time favorites list and perhaps the best writing I've ever seen.