Gregor was round at my house a couple of nights ago and we were talking about the games of Solipsist I'd been running with small numbers of players, and I was saying that I'd much preferred 1 or 3 player groups, as opposed to 2. 2 players is uncomfortable because it can become a head to head conflict of visions, whereas with more players there are many more combinations of world views, and therefore less inter-player competition.