Considering I'm pretty sure finding 3 players would be a challenge, I'm certainly (very rarely) going to have more than that. A lot of my friends are the type of people who if the rules take longer than thirty seconds to explain, they lose interest.
That said, if I am able to obtain the bare minimum of three players, how good is it? I keep hearing people express concerns about 4-player balance, but how about 3-player balance? I feel like the diplomacy aspect in a 3-player game would almost be kind of null, right?