Eh, it's all preference. What's the best type of underwear, women, beer?
Just carry what you like and what you have confidence in.
+1, I personally carry a G19 and sometimes a G23. I started with a .40, went to 9mm, went to .45, and I am back at 9mm and don't plan on changing that but I do carry other calibers occasionally for a change.

Bed time Sir
