My Satriani is in Candy Apple, so I always try to get a new color. I'd like the Egyptian Smoke in a JP7 (with the whole mystical 7's Egyptian theme in mind). I've seen it in person once, and it does look much better than the photos.
If I didn't get my black JP... then I would have gone for mystic dream, but then straight after that comes red, it definitely looks awesome. I can imagine the mkII will look even better in red.
Neither personally. I'm not much of a red guitar person, and Grey doesn't do it for me either. Sorry about the lack of enthusiasm for those colors, but you asked