My US one is lanoblesse. I also have a couple of Japanese ones, but it's been so long since I've used them that I don't even remember them, and in any case I don't have any of my JP 360s here with me.
Please note that I will not be accepting friend requests from strangers. I am sure that when my gamertag gets out there there will be many people who will try to add me, for kicks if nothing else, but I am only interested in adding active Insomnia subscribers -- people with whom I can coordinate shit in this forum (and obviously not banned users). It's just a quick and convenient way for me to screen people in advance, instead of wasting time on strangers who just want to play for five minutes and call me names or some shit.
So if you want to send me a friend request, make sure to post your gamertag in this thread before you send the request, otherwise I will decline it.
And this of course is only my policy. Everyone else who posts their gamertags here can do whatever the hell they like.
One more thing. For the time being, I am allowing people to look at my game collection, achievements, etc. Just realize that this is like my 5th 360 and my 3rd gamertag, so the bulk of my 360 gaming so far has been done on Japanese machines. In this one I've only played 4-5 games and even those merely over a period of 2-3 weeks back in 2009 or so, when Josh sent me the machine. This is the first time I fire up the system again since those 2-3 weeks.