You sound like a hypocrite. You are saying you didn't want people to stereotype you for being a cheerleader, yet to are stereotyping others by saying thing like popular, nerds, and geeks. You don't make any sense.
You can do something you enjoy without thinking you have to conform to the stereotype.
To be honest, you sound a little like what you would call a 'cheerleader' by calling people nerds and geeks. Are you saying that clever people aren't popular (if that is your defnition of nerds and geeks)? If you don't want people to stereotype you, you probably shouldn't do that to other people.