"I disagree with "Be especially sure you do not provide any comments in writing about your tenants."
Go ahead and write up the all the reasons why you are terminating a tenant, put it in writing and let the tenants have a copy. Then see how much your property gets vandalized on the way out. Or, how much they come back and vandalize it after they are out. If there was ever a time for a person to keep his mouth shut it would be when a bad tenant is leaving in an orderly manner.
Like your comments will remain a secret. What do you ask of current LL's. Nothing, nobody believes them anyway. Giving good references is the primary way they get rid of bad tenants. You will learn to do the same yourself one day.