For me, I really don't care about the crop factor. It is simply because the camera I use is a cropped body. And my first SLR camera also a cropped sensor digital body.
I have no experience with the film nor the full frame sensor. So, the equivalent focal length (FoV) means nothing to me. So when I use my 50mm lens and that is equivalent to a 80mm (FoV) ... and so what is that mean? It mean when I use a 80mm (if exist) lens on a film camera, the FoV should look the same. But I am not using a film camera, why should I care?

Why should I need to worry about what it will look like if I using a film/ff 35mm camera when I am only using a cropped body?
I think after I familiar with the cropped body FoV, so when I move to FF, should I need to worry about Full Frame Factor? My 50mm lens is a 31mm lens (FoV equivalent).
I think the crop factor is only for people who are coming from the 35mm film. Since they are familiar with the FoV of the existing lenses / focal length, so when they jump to Digital body with a smaller sensor, they know what to expect when mount a lens on the camera.
So OP, if you are not used to one system, you do not need to worry too much about the crop factor stuff.