Another vote for 9mm, Personal preference and all that I have owned and shot 9mm, 40 and 45 I dislike the recoil impulse of 40 and no longer have anything in 40.
I had a XD9 subcompact with the full size mags and sleeves but could feel the the mag moving in my hand while shooting cant say it ever affected my shooting but always bugged(headgames) me regardless.
Get a chance try as many as possible, Back to personal preferences and all the Glock never felt comfortable in MY hand the XDs felt better in MY hand but still felt top heavy the M&Ps felt even better in MY hand and Browning HPs and 1911s feel even better
Ford vs Chevy vs Dodge get out and test drive as many as possible before purchaseing.
“The man who reads nothing at all is better educated than the man who reads nothing but newspapers.”
Thomas Jefferson
If your not behind our troops please stand infront of them.