How bad is the excess skin??

I am having revision surgery from lap to rny on November 5.  I need to loose 60 lbs at the least to be normal weight for my height.  I am most concerned about how the skin will react once the weight is gone?  My triceps are mushy now and flapping and I am dreading to see what my thighs are doing to do - are they going to look like a pair of curtains hanging down?

This is all according to age and skin elasticity.
You have to make a choice, lose weight, or avoid sagging skin. 90% or more of people who lose a lot of weight have sagging skin.