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.
'If the world hates you, be aware that it hated me before it hated you. If you belonged to the world, the world would love you as its own. Because you do not belong to the world, but I have chosen you out of the world—therefore the world hates you.' ~John