If you deconstruct the movie then most of its pieces are great in their own way (visuals, music score, casting, acting, story, etc), but the problem for me is that the pieces don't fit together and even overload the whole thing in a baroque-esque way. I like it simpler, but I can enjoy more elaborate movies, though, Nolan's MO is just so recognizable that you can't help to identify the issues while you are watching. His opulent screenplays paired with stunning visuals and grandiose music scores push the inconsistent characters in the background and the plot is kept ambiguous enough to never fully commit to one story and Interstellar is no different. Still it also had a few things to it I liked, for instance, the story concept itself or omitting sound effects in space scenes (like it would be in a real vacuum) or touching on a few political topics with current relevance. So all in all, it's worth watching if you have 3 hours to spare.