The bikini top ruins an otherwise fine picture.

To me, the waist/mid-section is what killed it. Something about it seem weird to me.

something about the mid-section bugs me

The overall plumpness is thwarted by the hourglass waist, which due to the contradicting perspective of the body fat, makes her torso look extremely long and twisted.
The fact her body fat is affected by gravity but not her breasts in a tight bikini makes it worse.

Sexy.