I like the Glock 29. Large pistol power in a small package. Accurate and reliable. When I don't use that one, I like the G27. Not as accurate as the G29, but it is a little lighter and more compact on the hip in summer.
Whereas the G29 feels just like a chopped G20, the G27 is a different animal compared to a fullsize pistol. Not as accurate and not as controllable, but given the size it fits the bill.
The G27 is about the smallest I'll carry... Any smaller and I couldn't shoot groups that satisfy me. The calibre is really a monster considering the size of the piece --the G26 is nice, but why bother when you can get the exact same pistol in .40?