If you liked
Hellsing
|
...then you might like
Devil May Cry
|
Both series involve a main character with a mysterious past and they both have a tendency to use firearms to protect themselves and others. These series aren't for the weak-stomached however and you should be aware of this before watching either shows.
If you liked
Trigun
|
...then you might like
Seihou Bukyou Outlaw Star
|
Both shows involve the adventures of a gunslinging main character as he travels across many different places meeting and helping the locals who live there. They both also have a group of companions that help the main characters many times throughout both series.
If you liked
Afro Samurai
|
...then you might like
Deadman Wonderland
|
If you like a series were characters can be serious while having characters that aren't as serious then I think that you would enjoy this.
If you liked
Sen to Chihiro no Kamikakushi
|
...then you might like
Karigurashi no Arrietty
|
Both movies involve the main character being put into an unfamiliar situation and their experiences within said situation.