Oh boy, this could take a long time. So, rules after the jump.
A-what you want in the game(broad scope, say replayability, tough choices, fun combat)
B-a single idea or 2 that you’d like (some sort of driving, crafting armor, etc.)
Mine: A-So they have traits in the games now, I want more Replayability by getting a trait that randomizes where things show up. It would be great for later playthroughs. The idea being if they put that in up front they have it forever. I hate that later versions of Fallout on consoles would never really compete with the PC versions in terms of replayability. B-crafting armor actually sounds fun. Like making your armor just look crazy by sticking random stuff you found in the wastes together.
Have at it! Also something something never changes.