The Keep - This one was mentioned, by me I think, when we were discussing Michael Mann films earlier in the thread. I remembered enjoying this film when I was younger so decided to revisit it. Oof. IMDB says that Mann had 3h 30m of film but ended up chopping it down to 96m. I think this explains why the film has pretty much zero flow and regularly cuts from one major plot development to the next without explanation for the intervening time gaps. The resulting pacing and poor narrative really kills the film. The low special effects production values don't help either.
But darn it if I don't think that there is a really good creepy film in there somewhere, very, very deep. With all that extra footage I wonder what Mann would do with a director's cut. It's a shame that they couldn't do better with what could be an interesting story backed by such a talented cast (Ian McKellen, Gabriel Byrne, Jurgen Prochnow, even Scott Glen).
I would like to see this remade, maybe change the scene to present day Afghanistan.