thanks psyclepath.. You said what I didn't think of.. The little COMFORTs of being able to carry stuff.
I can carry a first aid kit without having to put it in my pocket. I don't know about anyone else here, but I've LOST stuff that i put into my pockets, they are behind me and sometimes stuff gets pulled out when i am getting other stuff.
On longer rides, I often carry extra gloves, hats, little things like that are truly for comfort; not really necessary; but they sure help!