I really liked Interstella. However it's one of those films where part of it was the tension, and wanting to know what happens next dragging you along. I didn't think Prometheus was toooo bad for the same reasons. However, not sure how either would stand up to watching again. At least Interstella looks amazing.
And Under The Skin was great I thought, in a weird 70s Sci Fi way. Kind of thing you would stumble across on Ch4 back in the day.