Hi There !
I've got a few ideas that I think can be added to the game-:
1- Quest/Perk- In the side quest 'Those' after resolving the Grayditch Fire-ant problem, you have the option of either letting Bryan Wilks stay in Grayditch or taking him to Vera in Rivet City. When I first played this quest, I thought there should be an option for the lone wanderer to adopt this kid. This could be an alternative way of getting the 'Child at Heart' perk. Poor Bryan has lost his parents, who better than the lone wanderer to be his guardian.
2-Vehicles- Sick and tired of seeing the same vehicles scattered around the wasteland. Maybe a few more could be added. Not the likes of military vehicles but vehicles in general For instance- Convertibles,Scooters,Tramcars,Bicycles,Tractors or maybe some Construction machinery- Bulldozers, excavators, road rollers etc
3-Clutter- Appliances like Air conditioners, Music systems,Washing Machines,Food processors or a buy-able grand piano, maybe.Not all houses need to look alike.Right?
4-Armor- School uniforms for male kids ( there is already a mod that adds school uniforms for female kids). A prom dress or better still , a ball gown could be added to a wardrobe in one of the old mansions in point lookout( there can be a quest in the background where someone would send the lone wanderer to recover The Duchess' Ball gown which could be somebody's family heirloom and offer a reward in return)
5-Creatures- Where have all the cats vanished? unlikely they did not survive the Armageddon. If dogs could survive , so can the cats. There could be 2 kinds - Cute and Cuddly domestic cats and the ferocious wild cats. Also if brahmin could have only one head.