Melissa has a question:
I also love the shirtdresses, but being fuller-bosomed, I have basically given up on owning anything that buttons down the front. Any tips to prevent gapping and preserve modesty?
First — did you make sure that the pattern you're making is the right cup size? As La Belladonna has often reminded us, patterns are intended for a B cup. If you're not a B cup (and it sounds like you aren't), you have to do something called a Full Bust Alteration (check out the Pattern Review boards or Stitches and Seams or this link for information about this).
Since I am not far enough away from a B to justify doing an FBA, I usually just make sure that the middle button is centered right between the two bust points.
Anyone else have suggestions?