The fellow who currently occupies my avatar, LS 01
, started out as a Self Insert Sue
when I was young and evolved out of his Stuness as I evolved and matured as a writer.
Old 01 destroyed planets for rather poor reasons and was never called out on it by anyone. He was a Boring Invincible Hero
, fighting enemies way below his power level (Immortal Precursor battle android Vs. average human criminal; who do you think will win?). He was the emperor of the most powerful government in existence mainly Just Cuz'. He never regretted his actions, and was never portrayed as wrong.
New 01 destroys planets for good reasons, and silently
angsts about it (that is, he grits his teeth whenever it's brought up in conversation). He fights enemies on par with his power level (Another combat android of the same make, a god-slaying universe-eating physical manifestation of all hate), and even loses occasionally (indeed, pretty often). He's still the emperor of the universe, but he actually has to deal with political matters on top of his adventuring and has a lot of responsibility because of his position. His decisions in the past actually come back to bite him, even if they ultimately turned out to be right. New 01 is hated by people who while portrayed as evil still have a very good reason for hating him (he ordered for them to be executed for crimes Earthlings would consider minor, they slowly evolved into complete immoral bastards after hundreds of generations trying to escape the law).
It's a pretty decent example of the differences between Sue and non-Sue.