Perun said:And this brings me to NPC creation and monster advancement. It sucks, plain and simple. To challenge my highish-level group with a BBEG spellcaster, I have to spend an extraordinary amount of time on his creation. Even if I skip details that really won't be used by the said NPC (like most skills), selecting feats, spells and magic items takes too much time.
What about the NPC templates in the DMG? Those are WAY better than any NPC-generating resources which were available prior to D&D3.x. If you go beyond that, you're just asking for pre-generated NPCs.