I've lived in Texas all my life. All my friends have guns. I've shot quite a few of them and have very much enjoyed it. Yet I have never owned a gun myself. Still though, I love guns and have an above average understanding of how to handle them.
My top pick if I could choose from any gun would be the SAIGA 12.
From everything I've learned about shotguns, it seems to be extremely adaptable to just about any kind of situation. Not only is there a wide variety of ammunition types including custom ammunition that's easy to make, there are several ways to modify the weapon. That's part of the reason why I like the SAIGA 12. I see it as a do-it-all weapon.
Bird shot - small game
Buck shot - larger game
Slugs - range shots or just make a big hole
Wax rounds - reduces spread
Magnesium round - catches target on fire
Frag round - bunker buster
Tango round - slices OATH 12 Gauge Tango Shotgun Ammo Plastic Case - 5rds - Limited Supply - TA120P
Flachette round - dices
Coin round - turns coins in to shirikins
Armor piercing incendiary - cooks from inside 12 Gauge Armor Piercing Incendiary - 3 Rounds Per Pack - G12-008
.50 BMG round - great for long distance 12 Gauge ".50 BMG / M17 Tracer Sabot" Shells - 3 Units Per Package - G12-050
Rock salt rounds - for small game, pests or telling someone to get the hell off your land
Etc. (I could go on but I'd be at this all day)
Now let's look at the different ways to modify the SAIGA 12.
Regular SAIGA 12
The list just goes on. One gun can do so many different things. I love it! Of course, in order to modify it, you need tools and time to modify it. Not to mention that all of the accessories and attachments would weigh you down along with the SAIGA itself being a hefty gun. Still though, as long as you have a home base, you can leave with whatever set up suits the situation.