Last NHL game I bought was NHL '11.
But I still play NHL '10 more. I have a ridiculously long dynasty going where I've drafted, signed, and traded to make an incredibly strong franchise that has no reservations about trading away a higher priced, higher rated player because there's enough depth to rebuild the team in two seasons.
Maybe when I hit that magical ten-season limit (if it still exists) I'll move to the new version. But from what you guys are saying, it doesn't sound like NHL '13 will be the one I move to.
Although I have been playing a ton of this on MAME lately: