i mean, in a way, every character is drawing from the self or from people you know, and i tend to put myself into all my characters in varying ways. maybe because im autistic, so cognitive empathy (or lack of it) leaves me with only really my own experience to draw from, but i think it leaves a link back to me that adds extra dimensions of understanding.
then again... yeah, sure, ive made characters that are genuinely me in a hat. maybe too much. its fun, harmless, and they tend to evolve away as i do anyway.