I would have more hairstyles. There is only one hairstyle I use most and that is seductress. Put in more full headed hairstyles, like pig tails, or loli pigtails. Longer hair. Dreadlocks. A mix of diferent styles.
Have bisixual, homosixual and lisbian perks. So you can seduce same six and both six people.
Have a hacking machine like Bioshock 1s Hacking Tool. That you can make or buy. Hacking can be hard.
Have Deathclaw Friend and Insect Friend perks.
Like someone else said. Have a slaver and raider society. A town like place. With advlts, children and quests.
Have make up options for both sixes. Proper make up, not a vague slider called 'eyeliner' and 'lipstick'. Seperate eyeliner, blusher, powder and lipstick sections.
Earrings for both sixes. Why the hell do games not put earrings in character options?! A mix of multiple earrings and styles.
Jewelery options for both genders.
Piercings for both genders.
Tattoos in character options.
A translater for languages. Not showing what Kage in Mothership Zeta dlc and the Chinese Remnants are saying is silly.
Made Kage get off the ship or know what he was doing and were he was in Mothership Zeta dlc.
Made Paulson in MZ dlc a bigger character. He is cool. He could have been a quest npc and live in Megaton. I would think a cowboy would be perfect for the wasteland. He would know how to fight, fix things and trap. The wild west is not so diferent from the wasteland in that is is a wild place full of dangerous beings.
He would not know about radiation, but he would know about if water was bad, and that is a start. He could learn fast.
A full explanation for Little Lamplight and Big Town. The most illogical places in the game.
More deep backstories for more of the characters.
The chance to do up old vehicles and use them. I would love to be able to use a nuclear motorbike, car, bus or truck. You could run enemies over with them, lol.
Mutated Horses. That you could call and ride with a perk. Call it Nuclear Cowboy.
Mutated big cats, wildcats and cats. Their abscence is illogical.
Changed the gross and unnessesery start.
No one wants to see that!
The start is grotesque.
Made a normal character creation and skill and special creation and started it at age 10 at the birthday party.
Thrown The Pitt dlc into a digital shredder and pit and burned out all sign of it's existance. Kept the good weapons and armour from it and put them in the main game but thrown the rest of it away. Made sure every trace of it's existance was destroyed.
The PItt is a horrible, depressing, unlikely dlc. The nicest person would not go undercover as a slave!
Made a good dlc based on lots of fighting, and fun stuff set in the Commonwealth. With no stupid overcomplex places, illogical and unlikely plots or sneaking or espionage!