StartupSchool: My experience with a good co-founder

It was cool to meet you all at startup school! I laughed so hard when Paul Graham had that slide about how a co-founder was like a full time relationship without the sex.

It got me thinking back on why I quit my full time job a month ago to work on Outspokes (http://outspokes.com). I think what pushed me over was how much I enjoyed working with my co-founder Arthur. I thought I'd take a break from yelling at him for once and actually write something nice about him :)

http://whatcodecraves.com/articles/2009/10/30/first_month_of_first_startup

I'd like to hear from other people who started companies. How were your co-founders? Did you guys fight all the time? If it didn't work out, what would you look for in a co-founder the next time around?