I saw both V for Vendetta and Sin City a few days ago.
V for Vendetta: It's an inspirational movie, not necessarily because of the ideal it portrays, but because it was able to fuse together the radical side of anarchy that it decided to portray and how it can seem repulsive to the average citizen. It also had good action scenes. I think the latter was what made me like it the most.

Sin City: I have not read the comics (nor have I read the book for the above), but it was a very interesting style of film. Not necessarily revolutionary like Pulp Fiction, but I liked the dark, brooding atmosphere it was able to shoot. I also liked the touch of unrealism that is inherent in comic books. Again, another enjoyable film, this one less enjoyable than the former because it seemed more incomplete. However, it was still an interesting concept and I can appreciate that.