you gotta think about what you need them for.
if you want these just as a static art piece to look at, then the 2 views is probably better, since it looks more dynamic.
if you want these for more than that, the 3 views is way more practical. for example, making 3d models of characters it's way easier when you have the front view, the back view, and then one side (without the arm, though) to build from, than if its 3/4 view.
