I smoke two cartons of unfiltered cigs and down a bottle of American rye whiskey as a warm up, generally. Then swallow beach sand and general aggregate to get some texture in the voice, followed by a stick of butter to smooth it all out. This works for me, but may not be for everyone.
I wouldn't call it bitter. I think it's just sweet. I've always believed my life seems like it's gotten better and better as each decade has gone by. So I don't see any I don't see any bitterness about it.