I really hate it that this happens, but occasionally I'll get some players along in my games that are virtually clueless of 40k. Or, even lamer still, only have read through the Codexes and although those books are really nicely done (for the most part) they don't really provide any detail for anything more than the archetypical Chaos villain. Just looking to see the approach some of you out there handle this touchy subject. It really seems to kinda suck though for me, because I have had time and money to read a truely VAST array of novels and omnibuses, and yet I've met other 40k players that have played as long as I, yet bother very little look through these books. I'm not asking for everyone to be a ravenous fanatic like I can be :/ it's just that some of these books are really incredible, particularly the books by Abnett, Mcneil, and Aaron-Dembski. (Ben Counter, Gav Thorpe and James too.)
Note: I'm not bashing on anyone, just looking around to see the myriad of ideas to handle this turn of events.