You can base a relationship on plenty of other things, but shared interest in something is pretty important. Music can be a big one for a lot of people. My wife and I met at a KMFDM show, and traveling to music festivals is still the biggest social thing we have going on at all. Doing that without her would be a lot less gratifying than doing it with her.
I feel like there is a difference between sharing a love of music and sharing a love of the same music. I believe I would struggle with someone who loved no music and/or with whom there was zero overlap. But I'd not expect to love the same things
