Call me crazy but... If technology gets to the point where Space Shuttle flights are as common as airplane flights, I will be the first to buy a ticket just to see the Earth from space and experience zero gravity.
The Earth At Night - photos by NASA. See the video here http://www.youtube.com/watch?feature=player_embedded=Q3YYwIsMHzw#!. Check out that cool T-Shirt here: https://www.sunfrog.com/Earth-day-T-Shirt-hoodie-Black-Guys.html?53507