hi krampus
6 months ago I would have said my legs and batwings. but they have really improved a TON.
for almost 2 years I have been working out 3xweek with a bootcamp style trainer. basically I feel like I had to build up more muscle than a not formerly obese girl. Combined with the last 6 mo of final fat loss, the muscle started realllllly showing thru and even seems to make the areas of loose skin look better due to muscle.
the other thing that helped a TON with my legs was lymph system work, specifically the dry body brushing. it decreased the water logged look on my calves. they are still super gigantic but they just look strong to me now.
my only real remaining problem area is my a$$

it actually looked better with a tad more fat, but im working to add muscle there and even in the last 2 months Ive seen an improvement.
many people losing weight short themselves on the needed aspects to develop muscle...so my best advice is to workout smartly to build muscle (I barely do cardio even) and to eat the right/enough foods to build muscle.