Taking one's own life doesn't necessarily make a person bad or nasty or selfish or whatever. I am aware of a number of people who have decided that they no longer wished to stay. Two in particular that I have been involved with were lovely people, one lent money to friends was always on hand to help others, was loving, selfless, didn't drink or take drugs, was in full time employment and came from a loving caring family, who had no idea that they were ill in any way or intended to end their life. The other was in similar circumstances but had a history of mental illness. Both had loads of friends and family around them and are very much missed. Other persons were affected by their final acts. Did they consider this? Probably not if they were in such dark places and that does not make them selfish! I suggest a psychologist or psychiatrist is best qualified to give detailed explanations as to why people,act the way they do.
And before any debate ensues, I am acutely aware that people have different levels of good and bad - I guess the message is don't make sweeping statements and generalisations!
Can we get back to level crossings now. Thanks.