I'll go ahead and write a first objective and actually useful paragraph, instead of just giving my opinion that nobody cares about:

Is this a movie for me?

1. I didn't like Inception and got very confused by it.

2. I loved Inception and found it very edgy.

3. I didn't like Inception, I thought it was actually pretty shallow and boring and it failed to impress me.

If you're in category 1, you will probably not like this movie, as this is the very same type of movie.

If you're in category 2 , you watch one sci-fi movie ever 3 years or so, if your forehead wrinkles when someone utters a concept as basic in sci-fi as "asimov laws" (for instance), if you get easily impressed and proud when you understand a movie that category 1 doesn't, you will love Interstellar.

If you're in category 3, you are more than familiar with sci-fi, whether it's movies, TV shows, literature or even video games. Avoid this movie, it will bore you out of your mind and you will get pretty annoyed by category 2 people acting like you're category 1 just because you didn't like a movie that felt challenging to them, and because they can't fathom the possibility that some people are way past this kind of movies and can't just be impressed by it.

In other words, this movie was just like Inception, mediocre. And since people really have a hard time with this word, let me just explain what it means: Medi-ocre. The Latin root word medi means "middle".

Bottomline this is an "average" movie for the "average" viewer. All the (current) 9.0 IMDb "average rating" does is reflecting that fact.