For me 
Mirror (never ceases to move me)
Stalker (The SF Film!)
Andrei Rublev (Best Epic/Period piece I've seen)
Nostalghia (get's better every time)
Solaris (Tripping w/out Acid)
Ivan's Chidhood (one of the great anti war films)
The Sacrifice (to me his strangest premise,but there is always hope w/Tarkovsky)

