dopey_kun, Just finished reading Mermaid Saga by Rumiko Takahashi. I really liked it. However, it does feel unfinished since it just ends on a random chapter. It's been 20 years since the last volume was released so I doubt we'll be getting more chapters anytime soon.
Still, it had some really interesting stories (and some hecking cool concepts) that made me interested in checking out more horror/supernatural manga. I'm thinking of reading Uzumaki by Junji Itou next.