I'm asking this question because over the past few years I've been hearing more and more people talking about fluff. I've been around this game since the day's of RT and the fluff (and game) were very different then today. Most people didn't talk about fluff, well nothing like they do now.
As for me I do enjoy fluff but in my opinion it has no bearing on how the game is played so at the end of the day fluff is just some stories that take place in the 40k world. I'm not calling anyone out with this but i don't understand why people let the fluff decide the game for them. It's just going to change again.
As I said the fluff is very different now and it even contradicts it self, so again I ask does fluff matter to you?