I don't favorite my own stuff on NG, mostly cause I don't want it popping up twice on my profile. My favs used to be a highly tailored list of my actual favorites but more recently it's become more of a like button lol. I really need to start using playlists and collections more often.
I do be voting 5 on my own stuff though, mostly games to get them out of judgement faster. I don't think it's unfair or unjust to vote 5 on your own stuff.