The problem of OCs being characters the readers don't know or love is another of my reasons for not being fond of marriage-type stories. I don't know this character or that character; why would I want to read about them interacting extensively with someone I like, when I could instead read about two characters I like interacting? ;) I can come to like some people's OCs, granted, but usually I honestly couldn't care less and don't want to put in the effort to get to know them better. I prefer for OCs to stay in the background and only have supporting roles in stories.