For me it goes:
1911 5" in .45 ACP or 10mm
Shield in 9mm or .45 ACP
LCP in .380
Ruger MK series in .22

If I were a big handgun hunter I would throw in a 629 in .44 Mag.

I could do it all with any number of full sized service autos or revolvers, but the small shield and LCP sure make it easier to carry in 95-105 degree humid days.