I've been spending the passed few nights writing a spec script for a sci-fi, thriller. Can't give too much away but my lead is the typical strong, silent type... but is silent a good choice? I love writing dialogue, the supporting characters blabber a decent amount, but my main character doesn't have much to say. So, question: Where can I find information on how much a main character should speak within a specific genre? Secondly, what are your opinions on main character's who don't speak much?