You bet there are. Even in my place there are, and my wife and I both have pretty distinctive, pretty consistent taste.
There's a painting, for instance, that I hate. My wife likes it. So it's up. If you're married, you understand this kind of compromise.
It's not distinct enough from the other art we have to draw attention to itself. But it doesn't quite fit. So what does it say about us that it's on the wall?
If we were characters in a film, it would say that we don't have a really clear sense of what we like.
We're not characters in a film, which is why it's not a big deal. But in a film, it would be death. It's not consistent enough with the other art to define our taste, but not inconsistent enough to raise a question.
Communication depends on clarity.
If your character is neat, a little mess is not okay. If your character loves music, there's no reason for him to have a collection of shot glasses. Unless there's a reason for him to have a collection of shot glasses, in which case he needs to have them.