I was looking back at Stronghold (who doesn't love Stronghold?) and saw a few ideas for mods!
1) A Rat Catcher. GRRRR, RATS!
2) A "Gong" (IE shit-cleaner)... actually, this is a bad idea.
3) Jousts! Jousts and Jousting. I say AYE.
4) A traveling fair.
5) Pitch & oil. For heating homes and industry, of course. Not boiling oil.
6) A Lord & Lady. Simply to peeve everyone off and give the poor guv'nor someone to suck up to.
7) Mercenaries! A spin on the Soldiers from CC?
8) A hat maker. So that you can have all of your villagers wearing fedoras instead of winter clothes. 10/10 would wear a fedora again