The 9mm is the perfect round for Europeans and women. For US Men: 45ACP.
No, actually, the euro-dudes are a bit soft for the powerful 9mm luger. I think they prefer 32 ACP is service guns there!
US women should be able to make a 9mm sing fine though.. . agreed there.
I like the 45ACP. . .nothing beats diameter! I have been known to cheap on my 1911's though with a 40 s&w or 357 mag on occasion though!