I also like to add fun tidbits of information to their profile, such as Likes, Dislikes, Fun Facts, Theme Songs, and Special Font.
Likes and Dislikes is a pretty straight-forward section. I like to be balanced here; for every like, I add a dislike, but you don't necessarily have to do that. Fun Facts is the section where I put interesting things about the character that don't seem to fit in any other section. Theme Songs is pretty straight-forward as well. Special Font is the font face I think fits them best, and would likely use for speech bubbles if making a comic with them in it.

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How To: Making A Transformers OC
Random----Disclaimer---- //..This is not mine, I found it on DeviantArt, so credit goes to that person, but it seems helpful enough for people who wanna create an OC..// Oftentimes when someone is introduced to a fandom and they turn out to become big f...