Guys, maybe I wasn't clear. I'm not directing this to messengers. Just to those that think that a messenger bag goes with a fixed gear.
I started this thread in response to all of the threads about "I need a laptop sleeve for my messenger bag" and "Which bag is best for my commute to school/work?" type threads. This is aimed at non-messengers as opposed to messengers. Sorry for the confusion.
I assume that messengers use messenger bags for the reasons stated above. But, us non-messenger types (like the majority on this board), might not really need 3,500 cubic inches (at least that's what my girl tells me to make me feel better), so a backpack will do just fine.