One thing I find more annoying then a chatterbox is a person who can't type proper english. Messages like this:
plz cum 2 ma plaz @ aftrnun.
People, please quit typing like that even in cellphones. It does not make you look cool, its retarded. It will usually make people go "what a ****wad". Unless you are in a situation that demands quick transfer of txt messages, please write proper english.