How would you evaluate his horror filmography?
The Bird with the Crystal Plumage is a great movie. Superb photography and OST. Interesting story and good acting. The kill scenes are maybe a bit lacking compared to later efforts.
Four Flies on Grey Velvet is very good. A bit uneven but once more the OST is superb.
The Cat o' Nine Tailes is good but I consider it to be possibly his weakest horror movie of his prime years (1970-1987).
Deep Red is a movie many consider to be his best work. I'm not one of them. A good movie for sure but I prefer a number of his others over this. I find this one a bit overrated.
Suspiria is amazing. A true feast for the eyes and ears. Such a stylish movie. One of my all time favorites.
Inferno is great. Another well done fantasy horror in the vein of Suspiria. This movie doesn't quite reach the heights of Suspiria but it's still a very fine movie.
Tenebrae is fantastic. One of my favorite movies of all time. Great OST, well shot, a fair amount of nudity and some great kill scenes.
Phenomena is bonkers. Such a whacky concept. A very interesting watch. Lovely photography of the Alps.
Opera is one of my favorites. Stylishly shot with great music and kill scenes. In truth it's maybe a bit uneven at times (some hate the metal music, which Argento started putting in his movies beginning with Phenomena).
Two Evil Eyes is just okay, to be fair Argento's portion was decent and it was Romero's which let the movie down.
Trauma is decent.
The Stendhal Syndrome is interesting and maybe my favorite of his post-Opera. The OST is wonderful. His daughter Asia was good as the lead in this.
Sleepless is decent.
Mother of Tears, Dracula 3D, Black Glasess... meh.