That last line is a extremely weak argument. Controlling different characters in different settings is an entirely differnt thing,. When you have several characters in one setting you immedietly have to worry about metagaming, circle jerking and the like. I play in the advanced section mostly, and I want character I feel are actual people, I wanna know what they feel and why they do the things they do. I enjoy the introspective and inner narrative alot more then the regular old "person B does this to person A". The latter wich you see a lot more when a player has two characters or more.
I realize of course, that alot of this comes down to preference, and that one cannot find a definite answer like you tried to pull with the /thread :P