how do you figure they have more personality and character? face it they're dangerous dogs... even if you raise them right, doesn't leave any garuntee they won't attack... and the way their body is built, it is far more devestating then say if a lab decided to attack.... they got a bad rep, yes, most of them aren't as dangerous as media makes it out to be... but there are still those out there that are dangerous... and ontop of that all, they are unpredictable...

edit: dude any dog has the personality to be mean... it's how you raise them (usually) that decides how they come out... just like people, you beat and abuse them, they are not going to be very nice when they grow up, you treat them with all the love you can, and they will love you back for it...