Oh lord, first of all, this is such a good thread. Reading everyone's comments here has been very refreshing because it's really cool seeing how everyone has a different way of connecting their creative work to themselves.
I think it's hard not to create characters that embody your personality and experiences, sometimes in ways you don't notice. While I deliberately write characters who are different from myself, and from each other, I know that each one also draws on my own experiences and traits--not for lack of ideas, but because these are the experiences, interests and struggles that are most compelling to me. Which stands to reason--we all write about what is relevant and captivating and moving to us!
I think all my characters have one major trait that differs radically from myself and one major trait that draws directly from my experience. As per everyone else who's posted here so far, time for a major dump/overshare
Hong Yi: Hong Yi is pretty much my personal interests kitchen sink. He's actually personal to a painful degree, to the point I get nervous talking about him sometimes. Like me, he loves marine biology, oceanography and bizarre deep sea creatures. He's also a Chinese international student surrounded by American influences and has grown detached from his home culture. We both have a foot in two different cultures and are ever so slightly being pulled apart by them. This detail clarified itself to me later, but we are both trans (in my case nb but more masc identifying) with families we're not out to. But he's so much more gregarious than I am; he isn't inhibited by anxiety. We have similar senses of humour...except I tend to repress it.
The eleventh world (i.e. Havaiki) is extremely grounded in my own nostalgia for my own life growing up on a tropical island, trying to find and grasp and hold onto all the things I found beautiful about it, since at times I thought it was so immeasurably ugly and this exercise of seeking beauty was the only thing keeping me going. I often felt trapped and stifled in Singapore; at some point I started to feel like I'd seen every corner of the island a thousand times. And I thrived on feeling like I was in a place I didn't recognise, thrived on the feeling of being lost and realising there were places I still didn't know, imagining life in a radically different form from what it is now. All that gets reflected in this world and its characters...
Pala and Fen: These two Havaiki residents get projected on a lot in ways very few of my other characters are. Pala especially: I'm suspected but undiagnosed as autistic; the notion that I could be neuroatypical upset my parents a lot and they always refused to listen to my experiences. As it has been for me, home is entrapment and she tries to as much time away from it as she can. In some sense, writing her as an autistic person who shares a lot of my habits and interests--maps, being alone in unfamiliar places, being lost, recording places in photographs, noticing unusual patterns others don't--felt like a chance to delve as deep into those subjects and experiences as I wanted to, while also getting to reexamine that omnipresent feeling of alienation, of being weird and different, that characterised my entire life. Fen is inspired by two people: my brother and my best friend, both of whom were some of the only people in my life who liked and weren't afraid of me, in circles where everyone felt distinctly the opposite (my siblings, my classmates). the thing I share with both these people was that we have all felt different, misunderstood and isolated, for different reasons.
Vesper, Ruthenia, Liss, Curia, Artur, Adamanta: "will stop at nothing to attain their goals"/"will work past the point where it becomes unhealthy"/"would give up all personal indulgences in the name of their cause" is an extremely common theme with my characters because...surprise surprise, that's the sort of person I am. So... 90% of my commissioners have remarked on how quickly I complete their commissions (in a day or less). That's really one symptom of my problem: I tend to feel as if something's wrong if I'm not working myself to death at any given point in time, which, combined with my unbreakable hyperfocus, can get very unhealthy very fast. The ability to put oneself aside in favour of an ideal is a trait that I have long had a deep relationship with, admiring it on one hand, and being terrified of its potential effects on the other, and on some level I definitely romanticize workaholism like it's the thing I want others to admire me for. I struggle with just...being, and not serving a purpose, so it's something I write a lot about.
Ruthenia: Ruthenia and her entire story are...of extreme personal importance. E&S was my therapy novel from when I was 16-18; you know how I mentioned in the World 11 bit that focusing on the things I liked about my home helped me feel less stifled by it? I have a bit of a history of writing about fictitious places similar to my homeland of Singapore (usually along the lines of being small island nations in the subtropics or tropics) and Astra was yet another. everything I liked about the world that I saw from day to day went into this story. Ruthenia as a person gave me hope; she's suffered but it has only made her more determined. (she was also inspired by my crush at the time, that's how it is sometimes)
Liss: She's referred to as having "the blood of the volcano" by her friends and the elders. fun fact: "the volcano" was one of the nicknames that my childhood bullies used on me because of the way I blew up and got violent when they harassed me. I guess this is me taking it and turning it on its head, weaponising it. Honestly a lot of my characters are power fantasies about overcoming my bullies and tormentors, and Liss is a definite example. I have a very similar mindset to her in some regards: I feel like I could do anything if I only decided to.
Anyway I'm gonna wrap that in spoiler tags because I'm pretty sure its gonna look massive once I post it