When you run a game in a set universe, how much attention do you play to the established lore? Do you try to run 'canon' games, where all the information is up to date and accurate? Do you just take the basic ideas and play with them? Do you make specific changes to things?
I know a lot of GMs in L5R whose preferred way to run Rokugan is "The Scorpion Clan Coup, the Clan Wars, and the Second Day of Thunder happened...but after that this is what happened."
I know some GMs who will read and re-read a ton of lore while planning their games looking for places to fit their stories and adventures in that matches up with the established story.
My own tendency is to take the vague idea, but not behold myself to lore. When I run L5R I'm running my Rokugan, and that means things may be different from established lore to fit my story. This is communicated as it comes up, and I try to keep it to a minimum, but it still is there.
What about you? Do you have a strong preference either way?