Solaris
I feel like this movie Will Be Forever stamped in my mind. I Just finished It, but i feel in a Deep state of awe, almost as It Is haunting me in a positive way.
I love how Tarkovskij uses the science fiction elements to expose the human mind. My personal opinion Is that Solaris Is superior to Stalker, in a sense.
Of course the stylistical aspect Is a masterpiece on his own: aside from the cinematography, which Is incommensurably beautiful and vibrant, i quite enjoyed the pacing of the editing.
Even if It Is almost 3 hours long, i didn't raise my eyes from the screen.
It was a very powerful movie for me, with no doubts. The only other One that made me feel like this was Mishima: a Life in four chapters, which Is also my favorite movie!
Props to the incredibly suggestive soundtrack, too.