my views are basically the same as gwenevyn's - not sharing minor interests is not a problem, but there must be something in common so that you have something you can share, activities you can do together, conversation topics you're both knowledgeable about and interested in, etc. I also have a category of 'red flag' interests in other people, like fashion or Big Brother.
I disagree with those who say there is always some common ground - my experience is that with many people I can find no common ground whatsoever - we may both be carbon-based lifeforms, but that doesn't mean we have something to talk about.
_________________
I am the steppenwolf that never learned to dance. (Sedaka)
El hombre es una bestia famélica, envidiosa e insaciable. (Francisco Tario)
I'm male by the way (yes, I know my avatar is misleading).