Treasure chests can only hold one or two items at most. People can hold a near infinite amount of items.
If someone in town tells you that they heard a rumor, it's true.
Dungeon monsters and traps will only attack or effect the hero and the people traveling with him/her. If you're just an unimportant person, you can go ahead and run through the dungeon, temple, forest, desert, cave, or other place teeming with evil unharmed.
You should always walk behind waterfalls, because there's always something hidden back there.
Animals, in general, will attack you relentlessly as you travel from one place to another.
Most people stay in the same exact spot all day long.
Everybody in every part of the world speaks the same language.
Sleep is the only absolute necessity of life. You can travel all over the world and fight as much as you want, and there is never a need to eat, drink, or go to the bathroom.
Most houses in the world only have one room.
After dealing your arch enemy an apparently fatal blow, don't think you can rest easy. He'll probably transform and become stronger.
You may see beds everywhere, you may be able to get into them, but you won't be able to sleep unless you pay money.
The world is flat.
You can carry 99 tents, 99 potions, and 99 Phoenix Downs, but you cannot carry 100 potions.
Items in treasure chests, even in someone else's house, are yours for the taking.
Your job is to defend a world that has less than 100 people and a limitless amount of monsters.
Store owners have the right to keep getting rich from the hero, even though the fate of their world rests on the hero's shoulders.
All methods of transportation, be they subway, airplane, boat or bus, are usually free.
When you get injured by a sword, or other weapon, blood will not pour out, only numbers.