I liked V For Vendetta, but I've never felt compelled to watch it again since I saw it in theaters ten years ago. I prefer Watchmen. It might be because I've always preferred the graphic novel of Watchmen over V For Vendetta and the movie didn't stray as far from the source material as V did. One thing I'll say about both films is that for all their faults, they're both propelled by great performances: Hugo Weaving as V and Jackie Earle Haley as Rorschach.
The Killing Joke could be the first perfect Alan Moore adaptation. I'll keep my fingers crossed.