Mental illness can shorten lives more than chain smoking, and America, unsurprisingly, is pretty bad at treating it. From what I can tell, Obamacare will help this a little bit, since even the lowest level of policy has better mental illness coverage than what insurance companies could get away with pre-ACA.
At my old Congressional race blog, I had a conservative commenter who was pretty reasonable, by which I mean that he was willing to accept that Obamacare was essentially a Republican plan and that he could more-or-less accept it. But he was adamant that he should be able to opt out of mental health coverage. He apparently felt that mental illness could only happen to lesser mortals, which is an attitude that is all too prevalent.