I play on a super-large map, but aside from it taking a lot of time to complete the game (some people like quick games) it can also run slug-but slow on weaker PC's. I have an Athlon XP 1600, so I got no problems in that regard, but I started playing Civ3 on a P3-500 and it was sluggish even on a standard map. I can easily understand people not wanting to wait the long waits a large map can present to low-end computer users.