One thing that has been ingrained in my mind since BOTW is my instinctive desire to place a beacon on a far-off landmark.
Frequently, when I notice anything far away, I prepare to drop a beacon but then realize I can’t.
Which game mechanic useful or useless would you like to see in real life?
Advancing through effort and dedication, not based on family connections.
So, the opposite of Naruto.
Neji was right in the end
Neji was dead in the end 
Skipping dialogue and effortlessly leaving conversations.
I just want potions that completely restore your energy. Just think of all the things you could accomplish without needing to sleep.
Fall from stupidly dangerous heights and take miniscule affect.
The FO4 / FO76 settlement scheme. I want to be able to break into a junkyard, stuff 200 pounds of trash into my jeans pocket, and then return home to fortify my backyard.
Or imagine being able to create a new sofa using just three pencils and a teddy bear that would be amazing, It would save a lot of money at Ikea.
Mechanically speaking, a few things: loading and storing, quick travel, respawning, cheat codes, bullet time on demand, personal inventories, and monitoring and improving my own metrics via a user interface.
GTA: San Andreas cheats allow for some wild antics. Picture this: doing a quirky macarena while cycling through my inventory, and then ending up perfectly healthy, equipped with body armor, holding $250,000… and an RPG-7.