I think the Gears 1 campaign was probably more fun for two players than one player because there was always fighting going on. It kept things quick and exciting. For one player, there wasn't as much depth or much of a story. Gears 2 kicked the story into high gear (no pun intended) but, with a second player, a lot of time was spent just walking and talking. Some people I played co-op with online get bored VERY quickly.
With GeoW3 supporting four player co-op, I think they're going out of their way to make the game exciting all of the time, instead of giving us those quiet moments that I loved (they build tension, add story, and make the universe seem real). It will be great fun for four players but what about when I want to play alone?
