Seriously, I hate private RPs. How would you feel if your friends were invited to a party but you weren't? That's the exact same thing I feel when I'm not invited to private RPs. Sometimes, a private RP have the most intriguing plot, but the creator doesn't invite me, and it gets me really aggrivated. That's why I never make my RPs private, so everyone who wants to can join, and not only specific people.