i learned a long time ago not to tie my emotions to anything, so id say i could lose anything. some i wouldnt like losing much, but i could lose pretty much anything.
if we are talking about aspects of your body, i would say, sight
Now if you count my house as a material thing, and losing it would put my kids in harms way... then I would have to change that statement. As far as the 'portable' things in life, fuggedaboutit.