I HATE anime. Well actually just the anime fans...
I did enjoy a few series, and the absolute best one I have seen is:
Paranoia agent.
a kickass psychological thriller.
only 13 episodes too. Every single one is very high quality. It has a very interesting story line, and while there are a few main characters, almost every episode is focused on a new related character and their perceptions of the main plot line, revealing new connections and twists. It's really really good. Trust me. I really recommend watching. All episodes are on youtube.