I like the way the camera moves: lots of slow zooms simultaneous with lateral tracking. The blocking is beautiful too, and there's an accidentalness to it -as is so often the case with everything about Altman's films.
Gosford Park is another Altman favourite of mine. It came near the end of his long, prolific career. I love the film more every time I see it. When I'm seventy years old and on my thirty-sixth viewing how large will my love have grown? There's so much to pay attention to, and all of it is rewarding.