I appreciate actors with imperfect teeth.

Too many completely straight and white teeth in roles where they shouldn't be and just like scars and wrinkles add character to a person's face, I think an imperfect smile does the same. As a recent example in The Northman you had some actors with perfect teeth, some without and the ones without felt much more believable to me. Obviously, context matters, but this is something we are probably going to see a diminishing amount of in the future.