Interesting thread.
There's bad singing and there's 'character' singing. Very important to determine where your singer fits into that parameter.
One person's opinion of suckage could well be another's opinion of character.
That said, if we are getting paid for our services ( I am not) then I guess we should be capturing what the talent is putting down to the best of our abilities and gently massaging it make it sound as good as it can while still maintaining the basic character of the original performance.
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