Politically I thought Interstellar was a simple story about the US getting a chance to be a colonial nation all over again.
I liked the way the film looked, 60% of it felt fairly plausible and the rest was utter bollocks with some particularly egregious examples. Suffered a bit from Prometheus syndrome where you were absolutely certain that no group of scientists would ever conduct a mission plan they way these did.
Overall I liked it on a first viewing. I think at this point I like it more than Inception and his Batman films. Been a while since I've seen Memento or Insomnia. I reckon The Prestige might be his best film.