I've been through a few but the mainstays from the current going back have been a S&W M&P, Springfield XD Service, Springfield Compact Carry, Beretta 82, Star PD, and 4" S&W 66.
Mixed in have been a few 1911s, Glock 19/23, Keltec P11/40, Iver Johnson PT22, Para 45-14, Kahr CW 9/40, and likely a few others I can't remember. The Para, CW 9, and a 1911 still get occasional duty for specific purposes.
I have played with sub compacts but find larger guns fit me better. The Kahr is about the smallest I go these days and only when I cannot wear looser fitting clothing.
