Death is usually pretty messy.  Painful.  Usually involving broken bones, or long prolonged suffering watching your body rot from the inside out.  I can see the appeal why some would want to experience that, but me, i don't think so.  If there is some quick, efficient, and 100 percent guaranteed painless method that's the way I wanna go.  F being 90 and soiling diapers.  I would take my final walk when i feel the time right.