Absolutely!
We even start looking at a tenant’s cleanliness before they move in.
We look at their car to see if it is filled with trash. We look at their clothes to see how well kept they are. We look to see if there is food spilled down the front of their shirt. We look at their overall appearance.
As a landlord, I want tenants who will pay, stay and respect my property. If they do not even respect their own appearance or property, why would I think they would respect mine? Having a neat and clean appearance is one of our rental standards.
Of course appearances can be deceiving and someone who looks well presented may turnout to be completely different behind closed doors. If so, we are not beyond telling them to clean up or even perhaps hiring a maid service.