Thanks Annabelle, actually I would do the same!
Now in a very extreme case I would clearly rather let humanity disappear to save the earth for a better race to emerge (in that case I would cease to exist as well and letting the earth die would also mean death for humans anyway unless all of us were to be teleported to another planet which is not very likely).
Next one:
Would you rather be confined to a wheelchair but be free to do anything you wish or be completely healthy while having to follow nothing but orders and commands unconditionally for the rest of your life?