Interstellar is slipping into my top 5 of all time, I love it. Tars and Case steal the show. And the end always makes me well up (not the very end, but the bit when…. ah, better not say!). Soundtrack is epically good. I think the characters are developed rather well, all IHMO of course.
Gravity is a very enjoyable romp, but the massive errors and liberties with physics do set my teeth on edge. There was a very good episode of ‘The Infinite Monkey Cage’ where they were discussing science and the movies, the guy who was the advisor to Gravty was on the panel and got an absolute caning, IIRC. Very funny.