Id like not to start. imho, life is the pain after all. There is anyway more suffering then enjoing. For example when you gon to eat you gotta be hungry for a long time. Despite food makes you enjoying, you will anyway feel hungry sooner or later. Thus you much more suffer then enjoing, no matter whether you are rich or not, loved or not. You proly remember more good things then bad, but it doesnt make bad things less. So, i thing the most common reason people steel living is just the disexistance opportunity to end life. After big happines always goes large disappointment. So living is always minus, while disexistance is 0. The most coherent and logical choice is obvious.