Pff, you kids and your 40k.
When I started playing back in the 90's, it was second edition. Back when it still had a sense of humour, and when there were no codexes for the Grey Knights, the Dark Eldar were just a throwaway line of fluff in a codex, the Tau weren't even an idea [s]with mecha stolen from anime[/s], and you had to scratch-build if you wanted half the stuff you can get nowadays. 

I gave up after the whole game was re-launched with new rules, as the Eldar army I'd spent £100's+ building and making into a killing machine was completely invalidated by the changes in rules, and I'd have had to spend as much again making it 'rules legal' to play. Plus I got fed up with how tremendously po-faced and SRS BZNS grimdark the whole damn thing was. 

Also, when someone once said that '40k is the best sci-fi universe ever' with a straight face, I almost died of laughter-induced seizures.