Have a few pistols but carry only one. A G23, but do use 2 different holsters depending on dress.
IWB--- Minotaur, OWB---Glock S/C.
Have drawers full of holsters but the 2 above meet my needs.
For training I use a Propane powered AirSoft G 19/23, an AA .22 Conversion Kit and my full caliber G23.
The rest mostly stay in the safe.