Yes, he's definitely an egomaniac and obviously holds himself in too high regard. 

I've seen most of his work and tend to like some more than others. My favourite (and only completely successful Greenaway film) would be Z.0.0., but i really disliked Cook..... it's not original Pete, it's all been done before by better film-makers, be they French or Italian. Apparantly he asked the crew to watch a few of his favourite films before shooting in order to communicate part of what he was trying to do with the work, proof of his lack on an original idea and an ineptitude at expressing himself. This is present in most of his work.

Sans Soleil has been described by bombastic by some and in terms of the voice over and visual presentation i can kind of understand why they'd say that. But it has something amazing going on that's not going on in Greenaways' work, it's amazingly cerebral. With patience and thought, there's so much to feel. Which is so not the case with Peter's cinema.