I am working on a project for Swords & Wizardry. It's my own little mini-campaign setting entitled the Hamlet of Hagreth. I have been knocking out some NPCs pretty quickly. Here is a sample:
Nick Hacken is a woodcutter that lives on the very edge of the hamlet. He appears to be in his forties. A life of hard labor has left him balding and weathered, but still strong and lean. His wife died in childbirth and now his only companion is his young daughter. Nick is handy with an axe and he knows every nook and cranny of the forest for miles around.
Nick Hacken: HD 1; hp 5; AC 9; Atk 1 hand axe (1d6); Save 18; Special: +1 hit/dam.
It has actually been a joy to create NPCs for S&W. Maybe it's just my old age, but creating ones for more 'modern' RPGs just makes my head hurt...