A lot of ideas!

[Axatros]

I'am from Poland so please correct me if I do any language mistake.

1. Temperature - If you swim too much time or stay too long near fireplace your temperature will be higher or lower than normal. It will give you debuffs like overhating or frostbite.
2. Seasons or/and climate. Biomes like Tundra/Tajga. Walking on the snow without boots = reducing temperature.
3. Locks and bolts skill will give possibility to create locks on chests. Player who want to steal something from this chest will have to destroy the lock
first and leave Vile Vapor of Vandalism or knocked you out and take your key.
4. Windows in hauses. Options "Pass throught the window", "Look out the window", "Cover the hangings ".
5. Dogs and cats. Dogs will bark when stranger players will be near. Cat will chase rats(like fox chikens or rabbits), walking on the fances , sit on your laps when you sit on chair(this will give you faster stamina recovering and warm to equate body temperature.
6. After World apocalypse like meteor shower what will destory everything.
7. More animations like bleeding or exthaust.

These are just ideas.

[dagrimreefah]

Dude, how could you forget bridges?

[HasseKebab]

Dude, how could you forget bridges?

Man, that gotta be embarrassing

[TeckXKnight]

Rule 5: Please avoid making grab bag threads with multiple unrelated suggestions. Give each idea its own thread so posters can discuss its merits, so that ideas aren't overshadowed by more popular ideas, and so that they might be found later using the search tool.

Mind you all of these ideas have been discussed to death though.