Makes sense. One of the most attractive things about my girlfriend initially was that she and I related some some things that a lot of other people don't seem to get.
I didn't get that much things in common in the beginning, except that we would understand and laugh from the same jokes. It took a while to refine many other things, like understanding things without needing to say and so on.
You have to have things in common to be a resting place, so that you have peace of mind while doing those things together.
You also have to have things that you're good at and that makes the other person proud (kind of envy) of you, things that they'll contemplate while you're doing.
And, finally, things that you suck at but they are good, so that you'll also stare while they are doing and will keep you enchanted.
I am madly in love with a girl because of just this. We understand each other where others don't, or would even judge us for the same (mis)understanding.
This phenomenon is alluded to in the spoken bit at the closing of Jason Mraz's "Details In The Fabric", with "You're an island of reality in an ocean of diarrhoea".
