I have a medium classic flap, vintage, in the lambskin with gold hardware. When I first bought it (preloved) I was so terrified of wearing it because of potential damage to the delicate lambskin. Then once I got over my fear and decided I would wear it because otherwise it is a waste of money and space, I immediately scuffed the inside pocket lining and corner of the bag just purely by it rubbing against my clothes when I wore it on the shoulder - after one wear. So that's put me right off!
I keep telling myself I maybe should've gotten the caviar with silver hardware, that way I'd wear it more, but honestly on reflection I don't ever actually find myself thinking "damn, it would've been so nice if I could wear my classic flap today". I think it's because the bag looks so formal, and also because it's the "easy" bag choice? Sometimes I prefer to pick bags that are a little more unexpected to finish off an outfit, not sure if that makes sense.