I don't think personal responsibility is much of an issue when a person is so despondent they want to kill themselves.  The issue is despondency, and the truth is, in too many cases they think taking their lives is the most responsible thing they can do for the loved ones left behind.  This is the unstated motivation in assisted suicide...people believing it is responsible on their part to remove themselves and their condition from being an emotional and financial burden on their loved ones.  The way the right uses 'personal responsibility' becomes a weapon to inflict self righteous pain, not a talking point.  It too often results in the exact actions it deplores.