I honestly don't believe there is anything inherently superior in one clothing size over another. Nor do I even really prefer myself to be one clothing size vs. another.
I just really would've preferred to be able to wear the pants I already shopped for, paid for, and had hemmed rather than spend the time, money, and aggravation to get a new set.
Also the size 2s made my butt look great. The 6's are a bit baggy in that area, but do prevent the muffin top. You win some, you lose some.