I have volumes of fluff in my head. Its all verry unorganised, and each time I put it on paper important details change, but I have my general Idea layed out and my plans for the future. In relation to my games, I try to incorperate what hapens in the games into my fluff. (For example, I recently played against some iron wariors, so now there are unconfirmed sightings of them on the homeworld)
Right now, they are waiting for renforcements from a (yet to be decided) penal liegon assigned by segmentum comand, due to recent escelations of the ork threat and posible heretical involvement. (allong with them will come more modernised weaponry, IE; the stuff in the new dex)
"A true king is never alone, his will is equal to the will of all of his followers."
-Alexander the Great, kind of