DO say:
I’m leaving to spend more time with my family and to pursue my hobbies.
DON’T say:
I’m leaving to try and dodge the impending lawsuit I guess is heading my way.
DO say:
My time at the company has been an invaluable step in my career.
DON’T say:
My time at the company has been an invaluable lesson in creative accounting.
DO say:
I will always treasure the many great opportunities this company gave me.
DON’T