I would give you something that everyone has been waiting for. I would let you change you looks, hair, scars and allow you to add facial hair and other "special" things to add to your personality that were and were not available to you when you made your character. All I would need is a thousand glimmer per hair style/ color change and a mote of light along with a strange coin, some harvestable materials from your explorations and patrols (such as rust iron) and 2,500 glimmer for every change that effects your body, since I would need the first two materials to even obtain the means of your eyes, face and other, less alterable aspects of your body. Where would I be? Well, since I would need to be able to get some resources from both Xur and the Speaker, I would need to be able to travel between both of the current safe haven for guardians, so I would not need a kiosk but I would definitely need a workplace, so in the tower I would crash somewheres in the hunter's bar when I am in the tower and in the reef I would be over in Xur's little corner when he arrives in the reef.