Bad breath is easily solved by proper dental hygiene and an occasional tic tac, the former which I know plenty about. Since I'm a man who loves some good eats, I'd prefer to keep my mouth in tact for as long as possible. Bad breath is rude, but nothing horrible and health related.
Coffee promotes endorphin distribution throughout the body, bro. Coffee makes you happy, it's the opposite of a depressant.
Pretty sure you're right on #3 though, caffeine is an induced rush after all. But I'm not worried about going out at age 60 via heart attack, I'm more concerned about my teeth than my golden years life. :P I doubt coffee will be what ends me regardless, I'm damn-well fit and healthy.
But your concern is touching regardless, King. :P