Just about all the guns I have purchased are "just because" guns. One I have managed to resist is the Mossberg Shockwave. I like the image I see in my head of riding a motorcycle, hair flapping in the breeze, and with the Shockwave in a scabbard strapped to my back.
In reality, I don't have a motorcycle, hardly enough hair to brush, and no convenient access to a range where I can fire at tin cans from the hip. But, that image just keeps popping up in my head.