Kieck

It will be useful in multiplayer, though. Or when the NPCs shall be added.

I think it would be nice (and most likely realistic) to give bigger backpacks (duffelbag or hiking bag+) a combat malus (for example swinging speed). That way you would be able to carry more while sacrificing your fighting potential. Also, to combat dropping bags as soon as you have to deal with a zombie, the dropping action should be longer when compared to smaller bags. Pardon me if it was suggested before or is planned.