I think it totally depends how you want to smoke. If I'm packing a bowl to pass around to friends, then I'll pack a bigger bowl and pack it a bit tighter so that it burns slower. If I'm smoking alone, I'm like Chiceh and load-up moderately packed one-hitters... no use having your weed smoldering in the bowl while you are holding it in, right? I also agree with everyone else that a joint rolled too tight is just a drag!
May all of your bowls be packed perfectly!
~rock~