If I have my pick I will go with a 9mm. Followed by 45acp, if I want a big boy caliber. But a .40 will work. I dont discriminate. I like all Calibers.
Variety is the spice of life.
.40 Short & Weak?
Just kidding.
I have a .40S&W in the venerable "Baby Eagle", all steel, and just as sweet as she looks.
A little on the heavy side for carry, but it's not my only choice either.
Like Usmccookie, "I like all calibers".
That's something I need top try, 40 in a heavier steel framed gun. I've only shot it in polymer striker fired guns
The CZ SP01 in .40 is a sweetheart to shoot.