After seeing last night I didn't think much about it but now that it has settled in and I had a few moments to look at this:

It starts to make more sense. I'm not saying it was hard to grasp at first, it's just the second I left the movie I wasn't quite sure where to start; discussing the plot, space, etc. My friend was blown away with all the black hole stuff which was pretty cool, granted we don't really know much about black holes to begin with.
I wanna say that Nolan tried to keep all these space concepts grounded somehow, like Cooper and his love for his family, that's what made the movie super dramatic. I wasn't so much worried that the mission would fail, admittedly we all had that gut feeling something good was going to come out of this billion dollar space mission. Nolan did a good job keeping Cooper and Murph as close as the could get even thought they were millions of light years away. That being said, People who are really into other sci-fi probably wouldn't appreciate as much as Nolan fans and people of other film tastes.
The other friend I went with was more interested in the relationships formed on the mission and the ones on Earth, she felt more of a connection that way. I guess it puts space travel into perspective, and for some it hits close to home if you have ever been separated from a loved one for an extended period of time. People can relate easily to emotion, which is why I liked Mann's monologue about how love transcends dimensions, not sure exactly what he said but you will know what I am talking about. Also, F*** you Matt Damon I had high hopes for you doing the right thing and then you went space-crazy.
One more thing that I liked was those block robots. They added that perfect companionship roll, and (sorry if I am stating the obvious) they were funny when the movie needed it. All in all the movie was cool, but I don't plan on spending $9 and another 3 hours watching it again. It IS just a movie, no matter how real they try and make it, it is supposed to capture your imagination.