In general do you prefer a film adaptation to stay true to its source material(s) or exercise its own creative licence?
I'm pretty keen that the film adaptation stay close to the original material. Particularly if I've read the original. The differences become jarring, taking away from my enjoyment of the film.
Of course, a film adaptation may have to cut material, including subplots and characters, simply due to the length of time available. This is understandable.
But deliberate deviations to give the film a different underlying theme, feel or conclusion - I'm strongly against. If the director wants a different message then they should find an original screenplay to work with and leave the source for someone who is happy to be true to the author's work.
One exception is for classic novels and plays that may have been dramatised many times. Then I've no issue with the director putting a new spin on things, since a consistent original version already exists.