User blog comment:William See/So ya wanna make a creepy OC./@comment-44778745-20200111183338

I think a good way to avoid the whole "mary sue" trap is by making the character off putting to you in some way. Make them disgusting, have them picking their nose or scratching thier ass in public, make them uncool even to you. Make them unlikeable from the start and you wont be too tempted to live out some fantasy through them. Then you can make them more relatable afterward.