[NyteSky]

For a lot of people, even geniunely smart ones, it's simply not their type of book. However my friends of that type still loved the movie, they just weren't interested in spending all that time reading that sort of book.
Then there's the ignorant masses that "don't get it." Grr. Those, like my little brother and parents, who simply don't understand the storyline, can't keep the characters straight (somehow Sauron and Saruman are impossible to tell apart for some reason). Though actually even they still like the movie, and my parents like the books.
The one legitimate (in my opinion)reason not to read the books is that they're really hard to get through the first time. Ok, that's not nearly enough of an excuse, but it is true. It took me till 6th grade or so to actually finish the series. (and since I was reading much longer books by 3rd grade, that is signifigant)
But I've never heard of anyone that actually read the books that didn't like it. Even non readers. So anyone that truly doesn't like it is either orc-kin or mentally deficient. (or more commonly, both)