Play by email is also great for enjoying games with people who suffer from serious analysis paralysis. These people are unbearable to game with at the tabletop

Play by email is also great for enjoying games with people who suffer from serious analysis paralysis. These people are unbearable to game with at the tabletop but really take advantage of the extra time afforded by async gaming to make for some deep games. It seems like some games (Diplomacy in particular) should almost explicitly encourage the medium of mail rather than table top play.