I've been drinking coffee since I was 13... that'd be almost 50 years now. Love Jacobs and Gevalia when I can splurge.
Fun trivia: caffeine, theobromine, and theophylline are all related compounds (methylxanthines). Coffee, tea, and cocoa all contain them. Caffeine predominates in coffee, theobromine in tea and cocoa. Theophylline is used to treat asthma.
Useful facts: Coffee, tea, and cocoa all have *some* ability to ward off asthma attacks, but coffee is sufficient for maintenance only in extremely mild asthma. It has been used (strong) as rescue/temporary maintenance therapy, though, by asthmatics who forget their inhalers, or are snowed in. This is why I decided to add the extra info; you never know who might benefit.
Both coffee and tea can help shut down migraine, again because of the methylxanthines, if you are a responder to them. Tea is usually best, easier on the stomach.
So there it is: coffee can be good for you. (For my brothers and sisters in IBS/IBD/colitis world, much sympathy.)
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"I believe you find life such a problem because you think there are the good people and the bad people," said the man. "You're wrong, of course. There are, always and only, the bad people, but some of them are on opposite sides."
-- Terry Pratchett, Guards! Guards!