1) Brilliant cinematography. It looks beautiful.

2) Great scoring. Love the music.

3) Unlike his later movies, you can still hear the dialogue. Woohoo!

4) The sense of wonder and exploration works really well. You feel like a boy.

Now onto the not-so-great-parts:

1) Dialogue exposition. When someone has to literally explain wormholes with a pencil and paper to the captain of a spaceship who is about to fly into one, I frown. That is just really bad writing. The entire crew should be professional scientists, so it's clear this was forcefully put in to 'teach the audience'. It totally takes you out of the story.

2) Similarly Dr. Brand explaining "love transcends time and space" is equally terrible. Does she really have to explain all that to the audience to make a point? Instead, let us experience that through 'show' rather than 'tell'.

3) Illogical things that bother me. For example, don't you think that beings from the future would be able to help us more effectively? If they can create a gigantic wormhole in outer space, why would they have trouble helping the characters efficiently, rather than building a 4-dimensional book-case / tesseract thingie, and have the main characters communicate by moving the hands of a watch?

Or, why would NASA build a friggin' space-ship but not have qualified astronauts to fly it, conveniently, immediately onboarding Cooper who just found the secret NASA hideout through the same ghost-bookcase? Mind you, he mentions he never flew in space, just on Earth. That makes him way less qualified versus people who have tested it in a simulator of some kind.

Or, why would someone who descends into a black hole end up in the tesseract? You can't just skim over that after suggesting to be 'scientifically correct'.

4) I was also not fan of the ending. Nolan had the same folded-city effect from Inception, and it was just a weird place that didn't feel like it could (or should) exist.