 If you liked
Durarara!!
|
 ...then you might like
Ao no Exorcist
|
I'm surprised no-one has put these two down for recommendations yet.
Both similar types of drawings.
Both supernatural (Ao no Exorcist - Demons, DRRR! - not fully centred on supernatural, but a big majority of it is based on myths/legends/demons).
Both similar genres - action, comedy, drama-ish, etc.
Both a very enjoyable watch.
Although I would say that DRRR! is more complex (but still easy to understand), while Ao no Excorcist has a much more simple story line.