Aren't the best films/tv series/whatever perfectly acceptable as both? If a story works on two levels - both as pure entertainment while providing plenty food for thought - then in my opinion that's a great story that can provide both a personal and wide-ranging experience with both an enjoyable time and huge amount of discussion on what else it could provide on another level. (It's one reason why, with all the depth and psychology and philosophy it presents, that I'm amazed feev isn't as big a fan of Life on Mars as he is of Lost, but never mind! ) While I didn't think it was the best film of the year, I am glad that it's got us all thinking at least, and it was enjoyable, too.