the man has such a tremendous body of work with so many classics, that i can hardly pick a favorite. it's usually just the one i'm watching at the time. they all have a way of stirring emotions within you. and they're always fun to pick apart.
if i had to pick a favorite, it would be 'fanny and alexander'. that was so amazing. i almost don't want to watch it again, for fear that it would ruin my previous experience with it.
also, two other great titles of his that may or may not have been mentioned are 'scenes from a marriage' and 'autumn sonata'. it's great to have ingrid and ingmar bergman (no relation, of course) working together.