Even with a healthy hunk of DM support, the fatigue and IC strife of a couple years of playing an evil PC in NWN1 was too much and strongly influenced my decision to play "one of the good guys" in NWN2. If DM support for an evil player group disappears, even transiently, things fall apart.
Some of the servers had scripted support for evil deeds (WD's taking the thugs to Skullport and selling them into slavery was my paricular favorite!

Couple that with a sense of some players that all plots are meant to be resovled in faor of good (I remember extensive discussions/arguments with Mayhem about this very topic), and that in D&D evil is simply meant to be the antagonist that is eventually overcome.
After all that rambling above, I guess my point is .....playing evil in ALFA is harder. If you want to do it it can be rewarding but it is certainly not the easy path.