I wish they didn't change film adaptions of books too much. I can understand certain things like cutting certain stuff out, but when they cut out really good, exciting parts and add in new, not as good parts to make it seem exciting... it just makes no sense...
I liked the first film, but I do think they made it too much like Lord of the Rings, the difference between the two books is pretty big, one (the hobbit), is a childrens book, the Lord of the Rings although being a spin off from the Hobbit is a much more serious adult book. I thought the Hobbit could have been a bit sillier. Both the books were based on how the Brits were in the war, as in ordinary people (aka the hobbits), thrown into life threatening situations and still fussing over ordinary little things like pocket handkerchiefs. I love that aspect of the books, all the singing and silliness and merriness.
As much as I enjoy watching films, books always win for me. Saying that though, I'm not entirely fussed if they add a sexy female elf to the film, as long as they don't change it entirely. I was not amused with the white orc though.... I keep wondering if I completely missed that out... or did it not actually happen in the book?
Although I agree that film makers don't owe fans a perfect film, as no one owes anyone anything, I do think if you're not going to come up with your own storyline and take your film idea from a book, get all the publicity that has already come from the book for your film, and then make the film, why do film makers feel the need to make it their own? It's not their own, they're making a film version of the book. If they make a good version people will love them for it. Making film adaptions is dodgy territory, although you will get a load of publicity and you don't need to come up with your own storyline, most people who have bothered to read the original will always compare the film to the book and prefer the book.