I think i would rather be half Werewolf like Jacob it sounds a whole lot better than being a Vampire. plus you don't have to drink blood to live, you get all the senses of a vampire and you get to turn into a wolf. whats better than that?
I would want to be half wolf. The blood lust would be too much for me to deal with if I were a vamp. I like the sunshine too much to give it up and I think wolves are one of the most beautiful animals on the planet. To change into one would be better then anything you could do as a vamp. You also would still be able to have children if and when you wanted to.
Edward a half vampire? He's full vampire, is he not? How can he be half? Renesmee is a half vampire.
And Jacob, being a werewolf/shapeshifter, he is already half human. I don't think you can get any more werewolf/shapeshifter than what the Quileutes are, so I think they are full werewolf/shapeshifter (even if that includes being half human).