So, for my reply. Its difficult for me to think of what I would like to keep on my person when most of the time I'm within 200 feet of my truck where I have a good BOB. But there are things that, if used, really require immediate availability. The first thing that comes to mind is a first aid kit with supplies to treat traumatic injuries and gun shot wounds, maybe copy a bit of the contents of a US Army CLS bag.
The next option would be a BUG and extra ammo.
So far I have the following, and its really all I can think of right now.
-First Aid Kit
-Back Up Gun
So maybe, even if given a comfortable option to carry extra gear on a daily basis I wouldn't utilize the space provided with an EDC backpack. But would still be better off with other methods of carrying these things (Although I think I would be getting rid of the first aid kit).
Maybe I'm just limiting myself on options because I'm so used to being space limited that I can't think outside of that box. Thats why I'm looking forward to seeing what you guys think.