The variables in ones life should dictate what you should carry ..

Where you live, what the main crime in your area is .. if there is gang violence where events happen with more then one Perp ..or more single robber type of crimes .. Living in a small town under 20-30 thousand with little to no crime .. shop lifting probably the one most likely .. Across the river there have been I think 15 murders so far this year and the crime rates there are all higher then the national averages ..

Myself I feel more comfortable with an auto with 10 or more rounds available .. but that is because of the crime not in the town I live in but all the towns around me .. which I end up having to go to to do certain things .. *Dr's etc ..