Just happened to notice that all but one of the keys on main key ring are attached so that their uncut backs all face the same direction and the cut edges face the other direction. Now knowing how anal some people can be, I would imagine that every key on their key ring has to face in the same direction and that there probably is a right and wrong way for them to setup a key ring - vehicle keys in a certain place, house keys in another place, padlock keys in another place on the ring, etc, etc..
So how do you set up your key ring(s) - I have no particular way I set mine up and currently I have 8 keys on my main key ring and maybe the only oddity is that what is a temporary key is on a mini-ring attached to the main ring. Oh and all three of my key rings has an aluminum bottle opener attached to them, all are different styles of openers but useful when least expected.