Actors
Although I agree with many fans who feel the film doesn't have the same magic as the series, mostly due to the absence of Ellis and Rees, imo the loss of Judy Geeson as Caroline is even graver. Mel Martin and John Bow, while not the Demelza and Ross we're accustomed to, bring a lot of depth and presence to their portrayals. Sadly, Fiona Victory, the actress playing Caroline, is so lacking in charisma that I can never really feel as though she actually is Caroline. I find I miss Geeson even more than I miss Ellis and Rees.
Ioan Gruffudd and Hans Matheson both do a great job with their roles, but I don't think Nicholas Gleaves, who plays Stephen, hits the right note, although the script might have had something to do with that, too.
Kelly Reilly - I'm normally impressed by her performances but there just doesn't seem to be enough "there" there in her portrayal of Clowance. I don't think Clowance's free-spirit and personality come through. It feels like Reilly is holding back too much. Her portrayals in her later roles are much better, imo.