Talking about this?
Vampires are diverse. Depictions of them vary from the very human to the wildly inhuman. This is a very human depiction, but as such is lacks much in the way of anything to make it more interesting than just looking at a regular human.
A basic set of inhuman "vampiric" traits you can use are the ones employed by Stoker. The Count himself is notable for his red eyes, stony complexion, pointed ears, intimidating height, and wide, paw-like hands with talon-like nails and hair growing on the palms. His fangs also push down slightly on his lower lip when his mouth is closed, making them slightly visible at all times.
In the end, vampires afford a lot of creative freedom in character design, and while there is nothing delegitimizing about making a nearly-human vampire, at the same time is achieves little and doesn't leave much to remember it by. The current design works best if its aim is to achieve subtly and comforting familiarity, rather than monstrousness and discomforting strangeness as less human depictions may aim to.
I notice the image names "Ben 10" specifically. If this aims to be in the spirit of that, then it would be best to avoid having the transformations look like nothing more than mere costume changes. Rather, the aim should be to make singularly good monster designs that are not overly tied to human nature or the normal human shape of the protagonist.