Glock in 9mm with night sights. If I was in a restricted state I would probably go a different caliber since I can't stand having wasted grip space, but it would probably remain a Glock Or other striker fired pistol.
Had a Beretta 92F, cheap import 1911 and an XD9, After years of resisting I bought two Gen 4 Glocks a 19 and 26.
Reasons; cheaper purchase price, cheaper mags, cheaper training ammo, holsters galore, mag pouches galore, parts all over the place, easy to work on and the go bang 99.99% of the time. I installed the NY1 spring to increase that reliability at the cost of a heavy trigger but I feel it's worth the trade off.
I have a Sig 228, Khar P9 and a Springfield 1911 as well but all I carry anymore is my 26 and 19. Primarily my 19 due to the weight and magazine capacity. Important for the holidays at the shopping malls these days with the prospect of aloha snack bar.
I invest in quality purpose built holsters made of plastic and mag pouches made of plastic. I thought about the holsters from blade tech and comp tac that are built for all guns in a series but different barrel lengths but decided I want full coverage so the muzzle and more importantly the front sight has a smaller chance of snagging on something. I carry the guns in blade tech with magazine in the Blackhawk mag pouches. I also have leather but prefer the plastic for the friction retention and the ease of reholstering won one hand.
Training I would like to get a membership to a range that allowed from the holster draws with some ability to move around but that is a tall order. I guess I will have to wait until I can get a piece of land and build berms so I can go 180 degrees around.
Now I jump on every opportunity the .gov gives me as the fundamentals never really change and supplement that with as much static range time as I can afford.
I need to invest in a shot timer.