There's a great quote about this movie on IMDB. It says just because it's interesting doesn't mean it should be enjoyable. It's fair to say that in parts and in different ways The Man Who Fell To Earth isn't very good or even deliberately not good in my view like hiring flat actors so that Bowie doesn't look too bad (I've seen him do much better roles in Merry Christmas Mr Lawrence and The Prestige).
Right at the end the synching is so bad they have to be ripping off a Fellini movie and it doesn't quite work in colour so I would call this movie Fellini in New Mexico as it's filmed in Roswell UFO country. Bits of it are great including photography and costumes. Even the sex scenes are too ridiculous to be offensive.