The common themes of introversion and/or social anxiety and loneliness, special interests and/or differences in one's own developmental trajectory and profile compared to the overall allistic norms -- mixed in with being a target of bullying, clumsiness, being the odd one out, and even sometimes implied certain sensitivities whether biological like allergies or sensory...
The deeper ones are how one reacts to relatedness; the longing to be more (like typical) human, to be with more humans (regardless of what it is)...
Whether it's an expression of finding their own tribe or their so called place... The things they're vulnerable to (exploitative relationships), the things they will be grateful for (small circle of tightly knitted friends or something)...
Or detest it the premise entirely because they deny to have those things, like a very disappointed optimist or a deprived elitist.
And some are fully neutral/apathetic. Usually are alien/foreign/artificial/whatever.
Either found love or family or whatever "redemption themes" of a reward they got and toned down, or double it down into their downfall...
Or just, well, do not change for better or worse whether because comedy and/or status quo or just is...
Well, even I cannot relate to it.
It's a mix of cultural, circumstances and a very different personal approach to just being different in my own case.
Like, yeah, I have similar starting points; initial similar traits, potentials and even some conditions, but it just ends there.
The rest of the story is mostly about the human or the person, the reactions, desires, priorities and endings... Things I cannot relate.
To me, coded characterization is just a sign of predictability to me.
Some things I just fancy being like them or just liking them characters.
Yet none relatable. None made me feel seen.