If a female may join the discussion, the BOB is one of my favorite topics.
We also use the dual BOB method. I personally use the Maxpedition Proteus and the old Baby Condor backpack. The proteus goes wherever I go.
I also agree with the importance of knives and firemaking. I keep multiples of each, both on my person and in each bag.
I like the idea of the braided paracord on the keychain... I will have to add that.
Thanks for the suggestion.