I do not think it's "100 greatest" material, but I'm a big fan of Pabst and Pandora's Box is certainly one of his best and considerably better than Diary of a Lost Girl. Sometimes those great films go over our heads and even a re-watch won't do it justice. I've decided that I might give Vertigo a fourth chance in another week when it shows on 70mm but that's another film that clearly seems to be great to every one on earth besides me. 

As for Pandora's itself I haven't seen it for about 8 years so all I can say is I liked it at the time.