User blog comment:Lucasthewikiguy13/Self-Insert Character Review/@comment-24092553-20171205013059

Pretty much what everyone else said. Unless your self-insert is going to actually change the direction of the plot, I'm not going to be invested in the fanfic because I'd get the same experience reading a script of the actual episode as reading Thomperfan's versions of these episodes with him added into the story.

As well as this, his self-insert is nothing more than a Gary-Stu (or Mary Sue, or whatever people call them) when you get down to the meat of it. Not only does he have little backstory and pretty much no negative qualities, he's written himself to be Leni's boyfriend, only good stuff seems to happen to him and no bad stuff, and always writes himself to act as the voice of reason in many of his rewrites, particularly of episodes he, or the general fandom, doesn't like (like Sleuth or Consequences or Brawl in the Family).

There's a reason they are still my least-favorite fanfics on this site and the ones I avoid the most, because they have no originality in them whatsoever.

Also, another self-insert fanfic creator on this wikia is Ianj1997, if you want to review HIS work.