I don't do a lot of panoramas. When I do, it depends on the subject as to whether I stitch verticals or horizontals. I will sometimes crop a single image to an aspect ratio that resembles a panorama, when I feel the subject demands that type of crop.
This image comes to mind. I shot a single image of a murmuration of Avocets. I liked the full image, but found that this crop worked much better for me. It may not do much for a lot of people, but I like it.
This is the full image.
This is the cropped image, converted to B&W.