Poll results are
here, and sorry about not having .44 on there at first...I'm forever on Rugergirl's blacklist for that one :frown:
There have been more results while I'll recompile when I can, but with 140 responses (asking people for their primary carry only, and if they have more than one, to choose one):
9mm: 49 (35%)
.45: 40 (29%)
.40 S&W: 22 (16%)
.38 Special: 12 (9%)
.380 ACP: 9 (6%)
For me, I'm primarily a .380 due to lifestyle, but also occasionally manage a 9mm, and am working on carrying a .45 more regularly.