I have semi-attempted (consciously) twice: once with pills (but not enough to die) and once with razor blade (but not deep enough to get the artery - they're much deeper than they seem!).
I have participated in risky/dangerous behavior: going home from bars with strangers, leaving windows open when a serial rapist was in the city, walking home alone in dangerous areas, driving drunk, reckless driving, mixing drugs and alcohol.
I had obsessive suicidality most of my life, but now it's mainly just when I'm having a rough go of it. I think it's mainly a comfort thing - if I know I have a way out of the pain, I don't have to take it...if that makes sense.
I still, though, have a sort of careless (or maybe it's careworn) view of living. If I have a close call, say in traffic, I may react instinctively to avoid the danger, but my immediate after-thought will be, "Well that (if I'd died) would have been ok, too". I work toward the day when life is more joyful than a strain and I don't look at death as a relief from the endless push. I think Sisyphus must have had PTSD (heh heh).
-Dylan