When I'm looking for a new holster, the first thing I do is decide what I'm going to use the gun for, that determines how I'm going to carry the gun, which determines the holster style, narrowing down my choices.
If I'm right handed and packing a rifle on a sling (hunting) I want a cross-draw hip holster so my handgun doesn't bang my rifle. If I'm on atv's or horses maybe a shoulder holster,etc.