Just as a side question: does anyone know any advantage or benefit to using view space for your tangents and such instead of world space? Is it just personal choice? Becasue to me it seems so wierd to use view space, it's not intuitive.

I understand if some stuff would already be in view space so you can save a conversion, but as far as I can see, nothing here is, it's all in model or world sapce as usual.