Inception
Christopher Nolan tries not to cast the same actors in all his films. Maximum difficulty, not recommended for the faint-hearted.
In all seriousness, few films have the ability to mark someone since they first saw it as a youngster. Inception is one of them. Since I first saw it, the impact it has had on me, my tastes and even my love of cinema is truly commendable. Even though I know every detail of the plot and even lines of dialog, I always want to see this film again. It's two and a half hours that feel like fifteen minutes, once is never enough.
Finally, I'll leave you with a paragraph I found in the comments section of the video of Hans Zimmer's live performance of Time, one of the best performances ever (makes me cry every single time):
Another mind blowing fact on this epic track, is that Hans plays the time tune. He just flows the same tune, same pace from start to finish. But you hardly notice it when the rest of the orchestra plays along. This shows how un noticed Time can be, but it is there, and it flows constantly, no pause, no skip, no break. Make EVERYTHING you can out of it, today, because it will tick away. Just leave down your phone and go for a walk. Get up from your screen and take a look out of the window