» Mon May 16, 2011 11:21 pm
There's a mod currently in production called Unholy Darkness which a lot of people are waiting on, and which looks promising. If I were you I'd keep an eye on that. There's a thread for it here where you can check out pre-release videos and screenshots and get more info.
Other than that, some good ones are Terran Vampires (beta), The Vampire Experience (beta), Aundae in Cyrodiil, and Nekhanimal's.
You can find all of the above 4 on TES Nexus and there are threads for Terran Vampires and The Vampire Experience here.
I highly recommend Terran Vampires and The Vampire Experience. Terran Vampires is based on Vampire the Masquerade, and offers the chance to choose which clan you join, and a level based system for upgrading a set of vampire disciplines, offering access to a wide array of different powers, such as Mist form, Wolf form, Various means of manipulating shadows, destruction magic powered by blood instead of magika, Viccisitude, Weather manipulation, and more.
The Vampire Experience is very customizable, allowing you to choose how you want vampirism to function. You can set variables such as how much/if you take sun damage, fire damage, whether you are weak to garlic or running water, and more. It also has a set of custom powers such as sprint, phasing through doors, and other things.