Loved the stark colours, varying between the black-and-white of the Giedi Prime scenes and Orange scenes on Arrakis. The blue of the fremen's eyes brings a beautiful contrast too.
Loved the action shots of the fremen bursting out of the sand, and Paul riding the sandworm.
Another cinematography theme that really drew me in was the contrast in size. For instance Paul and the sandworm, or the crowd on Giedi prime compared to Feyd-Rautha.
