Hellsing's story is interesting for the first six episodes. The show manages to create a world that is believable and worth investing yourself in. Seras is the new girl learning to find her way, Alucard is the mysterious hero/antihero, Integra is the strongwilled leader and Walter is the butler with many secrets and they're all fighting unknown enemies that appear to be related in some way. However that's as far as development goes. The second half of Hellsing doesn't deliver on the story that was promised and instead throws in a few other minor stories before the show suddenly finishes. There is great potential here, but it's all wasted.
The art and sound are done well enough, but are nothing special. The action scenes are what is supposed to carry the show since there is no consistent story, but without the development leading up to these action scenes it becomes difficult to be invested in them. Hence the scenes where the art and sound should be standing out instead seem mediocre. The OP is a catchy song though.
The design for all the characters are great. But with no development or depth, all we're left with is some shallow, one dimensional characters. Sometimes they would even contradict themselves. The enemies are a mix of vampires, werewolves and other mythical beings, but again none of them are fleshed out enough to care about them. The only one that could have been interesting was Alexander Anderson, but he's forgotten about long before the end of the series.
If you aren't worried about a plot or any development in the characters and just want to see some vampire action, this is a good series for you. However if you want anything more than that, then Hellsing won't deliver.
