For me....I don't want to play 1st chair. If find that most 2nd parts are more challenging and fun to play. The 1st chair in our orchestra and I are good friends, we play quite often together in Church and practice together.
Who's better? It's neck and neck, but he likes 1st and I like 2nd, either one could play either part but this is just how we agree. Our Conducter tried to assign chairs but it didn't really work so he lets us pick who plays what because he know we are going to make it work.