I must say I love sheath dresses. However, they're probably not the best choice for my pearish shape.

I like this polka dot dress:
http://youlookfab.com/2010/03/.....aped-gals/

I don't have any "fits in top, roomy in bottom" issues - actually, with me it's the other way around because I'm busty. Can I wear a sheath dress, then? Or is it a no-no for the well endowed?