It may not surprise you to learn that people who have experienced and enjoy all the same things I do tend to look a whole lot like me.
There, in a single sentence, is the issue with the concept of 'culture fit', something that is incredibly prevalent in the modern workplace. Companies like Google and Apple bang on about their 'company culture' so much that it's led a lot of smaller businesses to head down the wrong path; plus, it is very hard to realise when you're thinking along these lines. A colleague of mine recently stated that a potential new hire "just didn't feel like he'd fit in" and how he didn't think they'd "get along". The problem is, you're not supposed to employ people to be your friend; you're supposed to employ people to be your colleague.
Yes, shared values and ideals are a core foundation for a team, but we have to question what those ideals are. It's okay to hire people who are, as Matt states, empathetic and hard-working; not so much to discount them because they don't like Star Wars (even if it means the world to you). Different perspectives, different upbringings and different cultures combine to increase creativity, productivity and, ultimately, profit. Just look at the natural world: diversity increases stability whilst monocultures tend to wilt and disappear at the slightest disturbance.
Note: this was originally part of a full article titled "Thoughts from around the web" and the 13th post in my New 52 challenge. That article also linked to a blog post on logo design and an examination of modular design.