I'm on the "every other year cycle" for Madden. I hadn't bought a Madden in so long, and '06 was the first game I copped for the 360, then I got '07, skipped '08, got '09, skipping '10 and I'll probably (maybe) get '11.
I can't see paying for the same game every single year, especially when there's way more games that I'd rather get that don't come out every year.