Under what cirstances would you commit, or atleast seriously consider, suicide?

There is this belief that those who commit suicide are weak, and they simply don't have enough mettle to cope with things a lot of people just brush off and move on with. Isn't suicide is a coping mechanism for a mind that feels that there is no other alternative. Don't get me wrong, there are people who commit suicide for some pretty pitiful reasons, but overall don't you think those who do it are past seeking attention, that they feel that they know it is the only logical thing to do?