Prometheus is a funny one, the first time I watched it, it certainly didn't seem like the mega film it was hyped to be. The second time, it seemed a lot better, and by the third watching, it seemed like a different film altogether.
Looper, great n the first watching, but turned off half way through the second time. Maybe needs a few months before I watch it again.
Best film lately, Sourcecode. Only watched it once, but seemed like the sort of film I'll still be watching in five years time.