I currently work in a team of 5 designers. We all have our strongest and weakest features, but one thing we all have in common is: we're all introverts.
I had a feeling we were all introverts, but the confirmation came from a silly test called "What Type of Designer are You?". Analysing the results, I found it way too similar with the Myers-Briggs Type Indicator test (MBTI)... And I sent the link so they could take this test as well. It wasn't much of a surprise to see that the all results started with an "I" of introversion.
I'm not saying it's a rule, I went to college with a lot of people that certainly aren't introverts, but I think introverts have a tendency for art, design, music and writing. Let me elaborate: we introverts need our alone time and what we do when we're alone? We listen to music, we dance, we talk to ourselves, we write, we watch movies, we have fun - honestly. I lived with extrovert people and they simply needed to be around other people to actually live. They felt bored when no one was around... It was like they didn't like being alone because they didn't like themselves. Ok, that might be exaggerated, but I know introverts tend to known themselves and their personality better because we have to spend time with ourselves - or else we would freak. And that leads to self-expression, and that self-expression is not done by talking to other people. It's done by writing a story about another universe, it's done by writing a song about that conversation we wish we had, it's done by drawing faces that we never seen, it's done by photographing something from an angle that no one ever saw before.
We express ourselves different. And even if you're an introvert that think that you have no creative skill, I know you overthink about things and you imagine a hundred scenarios for an interaction you had earlier - that's your power you imagination. You are creative in your own way.