Thread:Flamebiplane/@comment-31401828-20180318213931/@comment-28718853-20180403191925

The best I have is to try to make your characters well-rounded. Give them flaws along with positive personality traits, and make sure those flaws affect those characters from time to time. Also try to steer away from making a dark and edgy character who is all about revenge, those characters plague enough of the RP market (not that you need to, but it's just a suggestion). A good OC is one that someone can relate to. Now this part is just my personal bias, but if you can, try to avoid overpowering your character to the point of a Mary Sue, it tends to get on people's nerves.

That's my advice, but I'm certain that there are other sites out there with helpful tips for making an OC.