fictionfolk joy is drawing yourself via drawing fanart but making little tweaks and feeling the overwhelming euphoria of seeing you as YOU. fictionfolk joy is knowing who "you" are, separate from your source and potential headmates. knowing what makes you "you" and seeing it as yourself and finally feeling happy in your own body, even if that body is in a drawing or painting or even 3d model or something.
I use picrews for this, mostly. it's fun to make my "base" source so to speak and then go back through and make all the tweaks (sometimes I draw them in) that turn it from Sourcegal to Me :)
Source separation is a wonderful thing for those who seek it. We're all pretty source-aligned, bar exceptions with our interpersonal relationships (for instance— Robyn's and Cherie's source characters DESPISE each other, but Robyn and Cherie get on quite well, actually.)