"Persona" is my personal favorite... "Seventh Seal" of course is awesome (don't stone me but I haven't seen ^this one yet) his "The Virgin Spring" is damn near perfect, and "Cries and Whispers" as well as "Scenes From A Marriage" round out my favorite Bergman flicks. Easily one of the greatest film makers of all time, no argument.
I watched "Perfect Blue" again, the other day... this time with the dubbed English. It was still great, but I feel I got more out of the subtitled version in the past... still an amazing movie, but I forgot how cheesetastic the very end was. Not enough to tarnish such a piece of work, but still made me chuckle. I want to go back and watch "Black Swan" again and see just how much is borrowed from "Perfect Blue".... I always thought "Black Swan" was "Suspiria" meets "Perfect Blue" or "Repulsion".