I don't view the issue as, 'is the 9mm enough?' because the truth is; of course it's enough. History proves it's enough.

However, the 9mm is considered to be the minimum caliber for self-defense. The question for me isn't, is the 9mm enough, it's rather, am I comfortable carrying the minimum? For me it's no, I would prefer to have .357sig if I'm going to be shooting a 9mm sized slug, or .45acp, or 10mm.

Now, if anyone disagrees and wants to carry 9mm; I'm completely OK with that; I like the good guys and girls carrying and I'm thankful to live in a place where we have so many choices!