Say, I wanna ask. How do you guys feel about making character-sonas of yourselves? I've been thinking about doing that for some time.
I did that a little when I was younger, among making other self-insert type characters, and it can be harmless fun. But as an aspiring writer, I eventually realized that there's some fundamental flaws with that from a writing perspective, most severely the "Mary Sue/Gary Stu" danger of creating a character who, because they are based on you and your likes and beliefs, can come off as too flawless or idealized within the setting, which isn't very interesting at best and can be annoying at worst. From a writing perspective.
As such, as I got older, I began to instead base characters not off my obvious or positive traits, but my negative ones. Flawed characters are much more interesting, human, and relatable--generally--than characters who are idealized, and by writing characters who exemplify my flaws instead of my virtues, I can explore those topics and parts of myself, create interesting conflicts within a story, while challenging myself in acknowledging those flaws and finding ways to either resolve them within the story or demonstrate how ruinous they can be if unchecked. Those flaws don't even have to be obviously bad things, they can be as simple as being too optimistic/empathetic--normally good traits--but encountering a situation where kindness or empathy cannot solve the problem, and how to reconcile that.
Again, this is just me as a writer talking, and I tend to overthink things or take things too seriously. In general, creating "sona" characters can be a fun exercise in both creativity and self-expression, and there's nothing wrong with that. But if using that to write a story for the public, it's important to be self-aware and not make the character too idealized within the story, or else it can rub the audience the wrong way.
