I'll be that guy. I do think the Tetris: The Grand Master series built on it in really good ways (shame this style was then discarded in favor of Guideline, but that's a rant for another day), but classic Tetris kind of just falls apart as soon as you start to get good at it.

It's a product of its time, but I honestly feel there's an entire genre worth of better puzzle games that came after it, and I have a small chip on my shoulder at the fact that Tetris is the only one that gets any recognition while every other IP lies dead and buried.