I'm currently on my 3rd playthrough, and I'm playing as a dark urge character who gives into his urges. For spoiler prevention I'll describe what I just finished as vaguely as possible. I just completed the durge objective that gives you a powerful reward in act 2.

This is depressing. All of the good that I accomplished in my first two playthroughs is absent. My camp is nearly empty. Lae zel's lifeless body has been laying in my camp for 2 full acts. Karlach, Wyll, Zevlor, Damon, Jaheira, and many others are dead, either by my hand or because of my actions.

I didn't fully appreciate just how lonely and depressing, self-serving life would be. I have more gold and loot than either of my other playthroughs, and I'm more powerful, but to what end? My own lonely existence? I don't think that I will continue past this point. I've accomplished what I set out to do, which was experience the game as an evil character. I don't think I need another 50 hours of this to pound the point home.

Hats off to Larian for making such an emotional and realistic game, full of vibrant and exciting characters. I don't enjoy the world where I have betrayed them all.