Hi!
I have almost seen all of Dario Argento's movies(except the new one which is only released in a few select areas... Il Cartaio is released in the Czech Rep, and another european movie. But, I guess this is a screener version and not the official release yet).
These are the movies from him which I've seen:
The Bird With The Crystal Plumage
Deep Red
Suspiria
Inferno
Tenebre
Phenomena
Opera
Trauma
Stendhal Syndrome
Sleepless
Iyon pa lang naman ata ang mga pelikula niya. And oh, I also have his 2 Disc Door into Darkness set. Iyong dragon release, these are supposedly his TV projects which didn't push through. Ok lang, full screen PAL region 0 dvds.
I enjoyed all of his movies to varying degrees. Although, I thought Deep Red and Stendhal were just ok with me. I loved Phenomena and Inferno. Argento's world is so crazy. His movies move in a logic all its own.