I guess the biggest problem I see is when a person rules out another person as a potential mate because that person doesn't share his or her passions.
If you absolutely love Beyonce, and I happen to dislike her and her music, you might automatically write me off as a friend and thus anything beyond a friend. I think that's bad judgment and severely limits the variety of great people you can befriend, date, and/or marry.
I guess I could've also asked whether or not your s/o needs to share your passions in order to have a long and healthy relationship.
