(OK, so I realize that most people do not have the option of making their own sweaters like I do, but...) the important thing is, as Jules mentions, how and where the bottom band hits your body. It's kind of like how you don't want the bottom of your shirt to hit at your widest point, only more pronounced because a band is a lot wider than a hem. When I knit sweaters, I often make them without a band, or with a looser band. Sometimes on commercially bought sweaters you can stretch out the band by blocking it (get it wet and pin it in a stretched out configuration). Depends on the fiber content how successful this is. I also try not to make/buy them right at the length where the band cups my butt, if you know what I mean. I prefer either longer (like a mini dress length, but caveat is that I have a big butt/hips but no saddlebags) or shorter (the band sitting right above the wide part of the butt can be very flattering, like on yours).
A cropped chunky sweater also works admirably well, and I love to layer long sheer layers under it.
