Well I have been told to see Waking Life by many people.  It is very interesting.  It raises a lot of philosophical questions that I have asked myself and others in the past.

The movie starts off kind of slow and is kind of confusing but this is because of all the questions it raises.

In addition, the first 15 or 20 minutes are weird and make you feel like your watching the movie drunk.  It is just how the animation is done.  After the 20 minutes you will start to get use to it.

Besides the stuff I just mention I would still highly recommend watching it (it is very interesting).

It is by the same people who made 'A Scanner Darkly' (it's an animated movie about this drug called 'D', if you haven't seen this one I would highly recommend also watching this).