I think it depends on the person. I've met a few people who seemed uninterested, but that's inevitable when you try to meet new people. That being said, I've been lucky enough to meet quite a few people who share the same interests as me. I think one reason why people may seem uninterested at the beginning is that most conversations, at least when people just meet, are just really boring small talk in which neither party have any real interest in talking about. I hate small talk so I sometimes end up in deep and personal conversations very early with people I meet. Like I said earlier, I think it's important that you try to find people to connect with, rather than just superficial friendships. I also have close friends with whom I share very little common interests and disagree on a lot of subjects, so while I think common interests certainly help, I don't think they are necessary.