12. The Dwarves
The Dwarves are easily one of the most disappointing aspects of The Hobbit, not because they're Dwarves, but because they're not developed in any fashion whatsoever; there are those we can identify visually, because they're good looking, fat, ginger or look like James Nesbitt, but on the whole, most of them just blend into one another because Jackson doesn't make a solitary attempt to actually develop them as people beyond goofy comic relief. Granted, Jackson's approach to character development would probably result in the film being 5 hours long, but there were clearly restrained ways to give us insights into the personalities of these characters. Furthermore, in Tolkein's book, the Dwarves were a little more dignified than we see them here, burping, burning furniture at Rivendell and essentially acting like louts. It's funny for about a second before it just gets tiresome, and moreover, feels out of step with the source material.