I think the psychology of co-founding a startup is so drastically different than any other social interaction that it's hard to predict what will happen if the

I think the psychology of co-founding a startup is so drastically different than any other social interaction that it's hard to predict what will happen if the team hasn't worked for a while together. We were 3 good friends "without an idea" in the summer batch. One I'd known my entire life (literally we met as babies). The other I knew for 6 months, but was a friend of the former for over 7 years. Very good credentials amongst us, and we had fun together just talking about ideas, playing tennis, golf etc. But ultimately when it came down to being "in the trenches" there were aspects of each other's personalities, decision-making style, work ethic, commitment etc that led to us being one of the teams that acrimoniously split up. None of us likes any of us anymore, sadly.