I prefer my Glock 23, but the reality is, I usually stuff an S&W 37 with Buffalo Bore 158 gr SWCHP rounds inside my waistband in a Remora holster with a speed strip reload.
I EDC an M&P40C most of the time but also carry the FS M&P40. Many times I'll carry the compact with a FS mag in it & always carry a spare, either a compact or FS mag.