Shall I choose Memento or Inception??
It depends, Inception is much more thought-provoking on just the film, Memento makes you question life around you because
I am sure Inception does the same, I just haven't found it yet, and what that means is Memento is more philosophical, so do you want thought-provoking and a film that unravels like a maze, or a philosophical arguement for your life.
I'll say I like both equally, but Inception is just so epic, the production budget, and the action pushes it above Memento.
BTW TDK is in between the two.