Amy, too bad you're *regular* in height. Since I'm 5' 1", I finally figured out that maybe I should seek out dresses in the *regular* section rather than *petites*. Ummm, but then they don't always hit me in the right places elsewhere.
I am now the proud owner of three (3!) dresses after basically going without for over a decade. When the third dress arrived earlier this week and DD said, "Mom, it looks like you," I figured out she said that because they were all: 1) sleeveless. 2) sheath dresses, 3) in a sort of blackish 4) zebra/animal/jungle print. The first was from Ross, the second from Nordstrom's, and the third was from Zappos which I notice also has the Nordstrom dress at full price. The Zappos dress is a petite, so I really need to decide if I want it a couple of inches above my knee or if I should get a regular size which might be too loose.
Soft, flowy fabrications have made me look frumpy my entire life which cuts out 90% of dresses for me. I've discovered that structure, ponte and linings are my friends. But the sheath thing is so much more constricting than wearing pants/jeans with flats!!! Adrianna Papell makes body con cocktail dresses that take off about ten pounds, but aren't really suitable for work or PTA.
Nordstroms and Zappos have free shipping, so I find them very convenient. I find it easiest to accumulate returns, then make one trip back to the store if it is Nordstroms, and one trip to UPS or just give them to my UPS guy.