MB was really about the people, not the game. If you "soloed" in MB and thought it fun, you have some sort of disorder :P Because there was almost no in-game content aside from the world, character models, and several items, all you could do was make friends and enemies. And because we're such social animals and bond to each other rather easily, that's really what we miss. It's not MB, it's those who were there with us when we were starting out.