The obvious and idealized author self-insert (no, adding some insubstantial flaws or making the character as ugly as them do not count) which is always treated nicely and favored by the god of said fictional universe (the author themselves!).
Multiply by ten if some of the times the character also purposed as a mouthpiece of propaganda for author's ideology, or they always get a love interest to simp and be their love slave for just being a normal person (e.g. helping people in danger when it is their responsibility/ability, being not outwardly perverted, just being themselves), or everyone who is mean to them is either going to be reformed into their best friend fan and fight narrator or mercilessly crushed to their soul by the god of the universe (the author!).
I am sorry to be harsh, but I cannot help but thinking "I get it, you are a loser, author," when seeing such characters.