I just finished watching 'Bodies' and we have to agree on one thing:
Timecrimes is the only proper time travel movie ever made.
Spoilers below...
Every other movie either tries to take time travel seriously (Primer, Minority report, Travelers) and fails by creating paradoxes or takes it lightly (Back to the future, Hot tub time machine, Groundhog day) and is not a real SciFi movie. Timecrimes is the only perfect loop and hence the only movie that avoid paradoxes. And what a loop at that. The reveal is just perfectly timed giving away each detail step by step. You basically figure it out together with the protagonist and watch him change his decisions as he realizes what's going on. The loop is the entire point of the movie and that's the only proper way to do it.
Bodies was close but of course they had to add a happy ending there and break the loop in the last episode which was pretty weak.
This movie almost ruined my relationship with my then girlfriend/now wife. I saw it and thought it was the greatest thing since sliced bread. So I super recommended it to her and she... Did not agree :P It's a very weird movie though, so I get it.