I know you asked for "shotgun" but, since I used to shoot crows out of the air, while flying, I'm including this one- My first overall gun, was, and still is, a Marlin 39M lever action .22. My father bought it back in the 50's. He, (having all of the woodworking skills of a Pied Billed Grebe), cut checkering into the stock and forearm with a three cornered file. If I had a dollar for every round I put thru that gun, I'd have houses all over the country!
My first shotgun, was a borrowed 12 ga, single shot, (can't remember the mfr.), from my grandfather. I learned on it, and used it for the first season. I bagged a few wabbits and squirrels with it.
Back then, I was an avid trapper. One of my first checks I got, I purchased a Winchester mo# 37 single shot, and used it for at least part of the next season. Around then, my father, who was a big Marlin Firearms fan, used to buy, sell, swap, trade and barter guns quite often. He bought one of the brand new model 120, 12ga, pump shotguns. I immediately fell in love with that big, ole, gun. We both shot it quite a bit, and he allowed me to take it hunting. But, having a short gun attention span, my dad soon put it up for adoption. He worked me a deal, for which I soon jumped on, again, using trampoline funds. I believe I paid him $75. (Believe it, or not, back then, it probably cost about $200 new) that became my go to gun for the next long while, well after I grew up and got married. When non toxic shot became mandatory, I sent the barrel out to Briley, where they lengthened the forcing cone, and machined it for, and installed choke tubes. I sure shot a lot of ducks, as well as other game, with it. However, while I never abused it, I certainly did use it. Over time, I finally wore it out. It started jamming on me, or actually, the empty would get stuck in the chamber, causing all kinds of headaches. And of course, at the most inopportune times. Luckily, my wife was with me one of these times. I crippled a duck, and couldn't get a follow-up shot. Since she actually witnessed this malady, it took very little convincing to allow me to buy a new one.
We spent the entire next Saturday traipsing all over NE Ohio, to every gun shop, sporting goods store, and even department stores we could think of. I ended up settling on a Remington 11-87 Premiere Light Contour. That was probably close to 30 years ago, and I still use it on every trip, near and far. Unlike the old days, today I can a little more easily afford a new gun, and there are certainly some beautiful guns to choose from, but I have no desire. This Remington fits me perfectly, I shoot it as well as anyone shoots, and it performs flawlessly. In fact, the only time it has failed me, and there have been very few, was my fault for not cleaning it like I should.
Maybe someday I'll purchase a new one, but as far as I can see, I have no desire to do so.
Jon