I hope you are doing well since your surgery. I had RNY in April of 2009. I am currently 36, but will be 37 in May of 2011. I have no regrets, at all, over having had this surgery. At my highest I was 375# and I am down to 205 (depending on the day

).
Yes, my health is my biggest concern. My heart thanks me everyday for losing that much. And the extra skin didn't bother me until the last few months. Now I wouldn't hesitate going in for surgery if I could afford too. Hey, my family, husband included, are just so happy that I lost the weight, no one cares about the extra skin. But I am only 36 and I am so proud of how much I have accomplished that now I would like to "update" the outside of me. My trouble spots are under my arms, thighs, and stomach. But my stomach wasn't only because of the extra weight. I had four really big baby boys. If I am never able to have the extra skin removed I will still live the rest of my life happy, but it would be nice.
Some of it will 'bounce" back with exercise. It tightens the muscles which in turn pulls it closer. But everyone is different. So many factors play into the equation; genetics, age, overall health, etc.
Personally, since losing 170 # I have the batwings, the flabby thighs, and a lot of excess around the middle. I can see some definition in my arms from toning my mucsles but still have the wings. I look at it as a reminder of how far I have come.
Congratulations and welcome to the "club".