Great question. One part of me says "no" for three reasons: because I love my home (even if I usually live a reasonable distance from it, in the words of Brendan Behan "home's a great place to get a letter from" (if memory serves he was quoting Joyce)), because I have barely scratched the surface of this planet and because even if we could easily move to another planet it wouldn't absolve us of the responsibility to take care of the one we've got.
YES. Tomorrow. Knowing I could never come back, yes I would. Because it would be a unique opportunity to be in the vanguard of the development of the human race, dealing with challenges no-one has ever had to face and to boldly split infinitives no-one has split before.
(my scratches on the surface are slowly and very behind the times described on my blog, "around the world without a clue" http://tyrrell.wordpress.com and in photos http://www.flickr.com/photos/sebastian_tyrrell/col...