I had a good time, but V for Vendetta was a disappointment. The heroes weren't anarchists, and the villains weren't really fascists - just jerks. And they cut the best scene from the book: V's dialogue with Madame Justice. (Check it out - if that doesn't make you buy the book at your first opportunity, there's no hope for you!)
Call me a hard-to-please fanboy, but it's not true. I loved Sin City and both X-men. But V minus anarchy just feels flat.