Immutable Laws of the Dungeon of Zot
1. A monk will always find a suit of platemail on DL1, usually runed or glowing. There are no exceptions to this.
2. When hungry, the chances of a monster leaving an edible corpse drop by half. When very hungry, this drops a further 49%. The exception is monsters who leave poisonous corpses, who will leave a corpse 100% of the time, unless you have poison resistance.
3. If you definitely have in mind a particular god when you start a character, the temple will appear on DL4. Every god barring the one you're looking for will have an altar there; the missing altar will be on DL9, most likely behind a secret door.
4. Characters starting with gods will see approximately three times as many altars to other gods between DL1 and the Temple than a character with no god.
Feel free to add your own