<human>: I'm considering getting into a long-term relationship with a friend I've had since high school. We've known each other for six years, but we recently started hanging out a lot more frequently over the past four months. It's to the point where I think I need to clarify the relationship status with her.

The main hook of our relationship is that we come from almost identical backgrounds and hold a very similar worldview. We only share a couple of major interests (church volunteering and music), although she's much more serious about the latter than me.

Personality-wise, we're also very similar. We're both introverted, with her being just a bit moreso than me. Although I thought both of our perfectionist tendencies would clash, we're able to sympathize with each other really well. She has a work ethic akin to mine, and she's very independent.

The problem is that I don't know whether having almost identical personalities would be a damper or a support for a long-term relationship. I hear my friends talk about how people are typically attracted to those with complementing (opposite) personalities.

I know it's incredibly subjective, so I'm wondering what your take on it is.

Summarize the given text in a few sentences.
<bot>: Is it better for me, as a perfectionist type, to have a partner with a similar or different personality than me?