I would say they always come in two varieties: a) disagreements on some future action, methodology, goals, etc., and b) disagreements on past action (e.g. is th

I would say they always come in two varieties: a) disagreements on some future action, methodology, goals, etc., and b) disagreements on past action (e.g. is the other person pulling their weight, being effective, etc). And of course, the latter usually leads to the former, because once you're convinced the other person isn't pulling their weight, you have to figure out what to do about it. Beyond that, it's hard to say exactly what you'll find to disagree on. But don't worry, you'll definitely find something to disagree on. In fact, if you never disagree on anything, then you're probably missing out on all of the advantages of having a cofounder as well.