Good call on dressed to kill. I think my favorite by de palma is sisters... I believe the hitchcock influence is evident in most of his work too. I kind of find him more entertaining than Hitchcock. Isn't Body Double in a way a homeage to some of his work? Even though I don't really consider him to be one of my all time favorite filmmakers or anything, I'd say he's one of the best I've seen when it comes to using the camera to tell a story. The split screen effect used in Sisters is very memorable to me. It was really clever to see the characters in separate locations going from one side to the next while the former couple is trying to clean/hide the whole murder. Then it eventually spirals into a strange direction that I didn't fully understand the first time I saw it.