Lots of good thoughts here. I'm not going to dwell on this topic overmuch, but I have a few additional things to say about this and then I'll let it go. After all, to deal with it is healthy, to dwell on it is not.
First, it's been suggested before that suicide is an act of cowardice. "They took the easy way out", etc.
To that I submit that it actually takes quite a bit of courage and resolve to see it through. Consider the second half of Hamlet's famous "To be or not to be" soliloquy (emphasis mine, obviously):
For who would bear the whips and scorns of time,
The oppressor's wrong, the proud man's contumely,
The pangs of despised love, the law's delay,
The insolence of office and the spurns
That patient merit of the unworthy takes,
When he himself might his quietus make
With a bare bodkin? who would fardels bear,
To grunt and sweat under a weary life,
But that the dread of something after death,
The undiscover'd country from whose bourn
No traveller returns, puzzles the will
And makes us rather bear those ills we have
Than fly to others that we know not of?
Thus conscience does make cowards of us all;
And thus the native hue of resolution
Is sicklied o'er with the pale cast of thought,
And enterprises of great pith and moment
With this regard their currents turn awry,
And lose the name of action.
He was in a great deal of emotional pain, to the point where he welcomed the thought of death. But he was turned "coward" by his conscience and his fear of what may have awaited him after this life. It's not as "easy" as some might think. There's nothing "easy" about that decision. In fact I'd say in every case it's an act of desperation that is not resorted to unless one truly believes there is no better alternative. This perspective is usually skewed of course, but that is the belief.
That is not to say that it is not a self-centered act, because it is. They are unable to see past their own pain and so focus only on self and not the feelings of others, but I do not believe that it is an act of cowardice. That's just my personal opinion, however.
Secondly, all personal spiritual convictions of right and wrong in the sight of God held aside, it's an interesting consideration from an anthropological point of view to see how much our perception of this concept is shaped by our own culture.
Most western thought considers suicide to be appalling, and the Catholic Church (among other religions) holds that it's a sin against God and man. That someone who commits this "sin" is automatically consigned to hell, never again to enter into the grace of God due to his or her forfeiture of what would have otherwise been their place in heaven. This is also reflected in religious commentary and poetry influenced by the church. Dante in the Divine Comedy (specifically the Inferno) places suicides in the seventh circle of hell (middle tier).
When the exasperated soul abandons
The body whence it rent itself away,
Minos consigns it to the seventh abyss.
Contrast this with the samurai practice of "seppuku", a form of ritual suicide whereby a warrior who was captured, defeated, or otherwise dishonored, disgraced, or shamed could attempt to reclaim some dignity and "die with honor".
To the christian it was an act of shame from which there was no redemption; to the samurai it was an act of honor to offset shame, an act of redemption in itself.
Either way, I think we all agree that we're better off here as long as we can be. Especially if we have family or at least someone in our lives who loves us. As short as life is anyway, it is a pity to see it snuffed out before its natural time has come. But is it "wrong"? I think it's all a matter of perspective.
Anyway, that's my take and my thoughts on the subject. Thanks to everyone for sounding off and participating! I enjoyed reading your opinions and perceptions.