I'm in my upper 40's and this is my 2nd go-'round with WLS. When I had Lap-Band surgery in 2005, I was younger and more "pliable". Having lost the same amount of weight with each surgery, I feel qualified to compare 30's vs 40's.
In my 30s, I didn't notice any sagging or wrinkling. I was happy. I felt good, I looked good (makes me wonder how/why I allowed myself to get right back where I started, but that's another story). Now, a little over a decade later, I'm more wrinkly and saggy. Not significantly and nothing I cannot hide under clothing, but I noticed it and it makes me self conscious. I also noticed crepey skin on my thighs. Again, easily covered with clothing. But the worst by far is the saggy, flappy upper arms. I try not to go out in public without these flappers covered (hard to do in Texas 100 degree heat by the way). I started this 2nd journey with no intention of plastic surgery, but I'm telling you...when I hit my goal, I am going to see someone about these arms and if my finances allow, I'm getting them taken care of.