I believe in...
Rulings not Rules
THAC0
Str, Int, Wis, Dex, Con, Cha
Save vs. Paralyzation/Poison & Death magic
Rod, Staff, or Wand
Petrifacation or Polymorph
Breath Weapon
Spells
I believe in Pig Faced Orcs, Level titles, the 10 foot pole, and that Knowledge skills diminish player creativity
I believe Vecna did it on purpose
Scantily clad elf chicks
Barbarians should not wear armor
There should be a Dragon at the end of every dungeon
Dividing up treasure back at the inn, rather than in the dungeon
I believe in Long, Slow, Deep, Wet Dungeon Crawls, that last for 3 days.