I was always partial to Low Light (v1). I thought it was such a great figure! He also was one of the more intriguing characters in the Joe mythos, filecard to cartoon. My favorite Cobra would definitely be Firefly, especially the comic pack one. I love the headsculpt there. Firefly is just a morally-bancrupt individual and would double-cross his own mother for a nickle. Evil, through and through. The figure depicts this well. Great accessories, sculpt, everything.