The first couple months are filled with the delight of loot lust!
My first mission I got a Silver Snake and quickly appropriated it. Nice aim, but ran out of ammo quick.
Not a huge fan of the flintlock. Love the new damage (40), but never tried it as a stun thumper. Thats a great idea. Usually, I grab handles for that.
I'll shove niners and black march pistols in, and even pack a hold out pistol or two, for gals with one slot in low inventory.
My upgrades in pistols that I move to as soon as possible are Clockwork guns. (60 Acc! Amazing 3Xrds of 40 damage). My one melee tank gal, carries a techblade and clockwork with about 10 reloads. She can fire off 6 rds per turn. Very nice.
Smart pistols are terrific too, and I store up assault pistols from loot to crank these out when available. They remain QD reaction side arms on gals for quite a while.
I'm a believer in the vanilla SMG, and the Spikey. I use them all the time for firing training, and once I get incendiary ammo, I use them for alternate light generation for night missions. The fire damage also makes them useful against even some armored enemies, so they retain utility for quite a while.
I did grab a tommy early, but it quickly went out of use. Autoguns are great with Snap for Reaction training and a nice rate of fire. They've suffered a bit against armored enemies, but I've kept them around even for melee gals.
For rifles, I'll use an ol carbine, then Battle/Assault rifles early on (BR with PS ammo is sweet for long range fire). I've lost my affinity to the boarding gun, because of unreliable distance fire. I probably should have it on some melee gals, but just haven't been happy with it.
I skipped hunting rifles this time.
Shot guns are a very hard sell for me as well. I've read the analysis on the Double Barrel for dealing with Ninjas and it makes terrific sense. I've stocked up on those and sawed offs, but still, haven't really employed them.
One my SharkBike gal, I've cut over to the Domestic Shotty with Rubber slugs. This craft follows targets of interest and shoots down and solos civilian craft. It is primarily a sniper training craft, designed to train up a gal's accuracy. The multiple hits required to down civs, makes it great for reaction and firing training. One of my Looted Defender Minus suits goes here to give the gal virtual impunity. Before this, I've used SMGs and Blackmarchs for basic firing training.