My wife and I have absolutely nothing in common other than being carbon-based life forms. We’re very happy.
In any event, the point of dating is to enjoy each other’s company, not each other’s musical preferences. As long as neither of you is into anything the other hates, who cares?
I agree that interests and values are different things, and that the later are much more important than the former. I would add a third category, however: expectations. The assumptions we carry into a relationship can be profoundly different, and if they don’t align, you’ve got to be very flexible in your thinking and very good at Long Boring Talks to get them to match up. Because different expectations will sink a relationship. The differences you notice right off the bat are not nearly as big of a problem as different assumptions about how you should celebrate birthdays, or who you should give Christmas presents to, or how often a bathtub should be scrubbed. It’s not the difference of opinions that gets you: it’s the stuff you didn’t realize it was even possible to have a different opinion about.