Cymre did this topic a while ago, and I didn't participate because I was either lazy or I forgot, but I thought I have one hour to go and maybe I can squeeze it in :D
Mataoka of Sugar and Blood asks us this week in the Blog Azeroth Shared Topic:
...with the new patch, and all the new things coming, what are three things that you will absolutely not leave behind? Consider these three objects your virtual backpack- the twist is, a tiny story to go along with each item.
The number one thing on my list would have to be my Formal Dangui. Transferable around all my toons to wear, it's rare and it's gorgeous and it's original. I remember the day I found it, I was so excited! It's a limited supply item from a vendor and someone said it had a 3 month spawn! I am not sure if I believe that... I don't know many people who have it but I feel lucky to have one.
The second thing is my Arcanite Fishing Pole which I won from the fishing competition. I love my fishing rod and I will be sad to see us doing away with fishing rods in Mists. I hope it doesn't suddenly disappear from my bags, because I would like to keep it, like I do with my other useless items such as Mallet of Zul'Farrak and Scepter of Celebras.
The third thing is my Sawbones Shirt. You can't get that in the game anymore! And I still use it as my default red shirt, here it is on my feral set. The only time I would even consider getting rid of it, would be if I got Precious' Ribbon but even then I'd probably still hide it in my bags somewhere.