The site currently has a character limit of two high school age characters per show per player. Since we're growing and there are plenty of characters that might not be popular, I'm thinking we should lift this limit.
For posterity, the rule actually reads as follows:
Update 4/7/16: We have slightly changed the way canon's are dealt with. While there is a limit of two teenage canons per show per player, the adults are now unlimited. Please do not abuse this.