Sorry, I really suck at explaining this. I don't actually mean "authorial self-insert" in that fashion - none of my Sues have ever been self-inserts, and the character I write with the most in common with me tend to run more along the lines of "I am sick of hardly ever seeing characters who stutter and aren't incredibly offensive, let's make one" than Sues.

What I mean is... essentially, I think, that the character's viewpoint is objective reality in the fic. If they don't like someone, that means that character is inherently unlikeable, and so on. I sort of interpret that as "authorial avatar" because they're not really being written with independent opinions and emotions, if that makes any sense at all.