This could be both good and bad. The more you get to know someone, the wider your mind becomes. People are very interesting, you know. Precisely one of the reasons why you’d be in a relationship with this person, right?
A lot of times, even though at first you might not see each other eye to eye, the deeper you learn about their way of thinking, your perspective towards certain things could change. You are able to see things in a different light. Sometimes, it’s a good thing. Sometimes, it’s not.
When you start to lose your own identity to the point where you are no longer thinking for yourself and you no longer have your own opinion, then I guess that’s when it starts becoming a bad thing.