I chose the 42 as my EDC firearm because of its size: it is big enough to get a solid grip for precise shots at range and small enough (barely) for pocket carry if necessary - but it usually winds up inside the the waistband. It is thinner than my 19 for reduced opportunities to print. I don't like to rotate my EDC firearm (how can you carry a variety of firearms "every day" anyway?) and stick with just one for maximum familiarity. The G42 is the best compromise IMO. As a .380, you can't skimp on ammo selection. It is a "marginal" round and some are more marginal than others. Underwood +P XTP is my preferred ammo type. It doesn't expand, but offers consistent penetration with a pretty nasty wound cavity that is not significantly reduced compared to an expanding round.