Hopefully so much customization they can even fit in the engine. I'd rather be in a situation when I create my char and enter the customisation options to be "Omg, this is going to take forever" than "move one slider to the left or right" and then done! And when it comes to armor, lots of color and metal choices. Change colors of buckles, straps, add patches to cloth and dirt or tear. Add scratches to plate bits and traces of blaster hits, even small attributes like some piece of a alien added for proof of kill or something like that. So as I said the more the better.