Some people like riding with people from their bike club. Some ride with friends from their neighborhood or work. Me, I'm married to my riding partner. This has advantages and disadvantages. (Doesn't everything?) But there are definitely more advantages than disadvantages. He is stronger and faster. I descend better than he does. (We have fun chasing each other on hilly rides.) The biggest advantage is being able to share something that we both enjoy totally.
Can't beat that.
