Dean said "I must say I have been extremely lucky to be a business partner with my brother. Most of the time, working within families or friends fails bcs people do not know how seperate business expectations from family/frienship ones. My best friend (35+ yrs) wanted to open up a restaurant with me. I told him I value the friendship more than another store so I declined. "
My father ran the Caterpillar Dealerships in Wis for 15 years in the 60's-80's and he had a basic rule on that,
1) never work with the people you play with
2) never play with the people you work with
If you have avoided problems with your brother I say you two have a very strong compatible relationship from well before the business, and that is very good on both levels B and P- congratulations to you, that is a success few people in this world can claim.
But I have talked to to many who had so many problems in business with friends/families and even spouses that, that you are better doing the business alone to save both money and friendships. Money can do strange things to the best of friends.
Also by following both rules your save a lot on the sexual harassment( paternity )

lawsuits by your employees and self, but hey we go to SJ

so it just be employees that need to follow that rule.