I don't have too much trouble with loose skin. Not sure if its because I still played sports even in HS (when I started gaining massive amounts of weight) and at the beginning of summer have gone to a gym where I included weights into my exercising. Another factor is that I started when I was 18.
My stomach has a bit of a "pouch" I'd say, but it's pretty tiny & I'm hoping that it'll decrease even more as I go lower on the scale. If not I heard that sometimes insurance companies will offer you a tummy tuck for people who have lost at least 100+ lbs. Not too sure how this works -- it may just be with how certain doctors word the insurance claim but my mom knows a doctor who said she could do it for me but I'm against doing that-- not until I have lost all the weight I can "solo" & then maybe I might get it to treat myself -- not sure.
The only other place where I can even say there is some loose skin would be my arms -- they seem to be bigger than girls who have not been as big as I was. Hopefully I can decrease this with some more weight resistance training.
Everywhere else, I can't say that I have any loose skin (Thank heavens!) I got pretty lucky. My boobs shrank about maybe a half a size? (hardly anything, actually a bit upset about this) They were a very full D/DD (depending) and now they're about a perfect D. Maybe I still have to loose more weight for more to come off in that area? I'm just glad I decided to change my lifestyle when I was 18 instead of later when my skin would have less chance of bouncing back.