Personally speaking
-I want to play as a robot similar to the humanoid Harkness from FO3, and have the whole game revolve around that concept
-Every Lvl up: build up stats skills & +1 perk and all perks should be stackable. It would force somebody to think REALLY hard on what they want
-Choice Perks: You pick whatever perk you want and power up your character however you want for your adventure needs
-No more S.P.E.C.I.A.L: I realized this in NV thats its a pointless stat thing to have especially since all the bonuses do is improve your skills by +#%. What good does it do me if i max out strength @100 but have STR@6 which is a bonus of Carry Weight 220lbs and Melee Damage +12. Where alternately just let me level up my offense, because i honestly dont scavenge when i play, so i dont need the boost in other places
-Bobble Heads: But instead have extra perk benefits like Bloody Mess, Low level Night vision, Poison resist, burn resist, disappear from sight at night stealth bonus, sun in the enemies eyes lowering enemy accuracy during the daytime, swim faster & hold breath longer under water, rapid fire punching in unarmed,
-Side quests with their own story that tell the history better than the random files and Email you find
-90% of all NPCs should have a quest option: even if its for something small and silly, could still use the XP & loot
-Key Item Trading: To get better loot, you should randomly find a specific item THEN when you do come across the other person in the wasteland, give it to them to get a rare item in return
-Less Stimpaks: I just get hundreds of theses every time i play and rarely use them
-MORE WILD WASTELAND: Because its a video game, lets have some fun with the post nuclear apocalypse
-More Humor: Dialogue /referential / easter eggs / dark / ironic
-The option to increase/reduce the rate of enemy appearances: for some of us who want throw down Crowd Control style and gets some power leveling in
-Elemental Weaponry: Theres already a flamer & Shishkabob, so why not something like a Weapon that sprays subzero fluid at the enemy, or maybe a mini Emp launcher or taser to screw with the robots and stun the hell out of raiders
Enemy AI
-Attack you while sleep, sneaking enemies, enemies that randomly appear behind you to keep you on edge, mercenaries hunting you that wait outside towns you just went into, snipers taking shots at you from distances, baited booby traps, baited loot finds, suicide bombers, angry stupid shooters, cowardly campers, smart melee users, groups lead by a team leader but weaken their resolve when the strongest member goes down
-Variety in Abominations: Deathclaws & Supermutants cant be the only thing born out of the bombs dropping, theyres gotta way more weirdo mutations out there such as Gator Turtles, Land Sharks, Giant Vultures, and maybe some hallucination induced enemies because you walked into an area thats not hospitable like gigantic eye balls following you, toy sized super mutants, ghosts ghouls, headless vault dwellers that shout obscenities at you, or weird shit like a horse headed robots with tentacle arms holding laser pistols that shoot slow moving decapitated heads at you
-More Fallout 3 variety of Weapons, NOT New Vegas: Cause that crap was a hassle considering you find random ammo for random weapon ... and thats why i only played as a melee/unarmed and sold all my guns and ammo in NV
-Change Unarmed/Melee to Martial: Your using your arm strength for combat, whats the point in separating them?
Perks i want implemented
-Faster running speed: AS in these are BIG fakkuking games and i want to make from A to B as fast as possible. If the situation is that i have to take on some raiders and then the perk turns off, im fine with that
-Better Agility offered for Martial: If your not a shooter player like me, and you want the advantage over a couple of gunman, why not give me the option to zig zag through gunfire?
-More abilities for Martial: Guns get all the perks and thats cool, but why not some options when fighting face to face such as combos or rushing attacks like in Skyrim
-Luck progression: Better luck for you the less in favor of raiders fighting you shooting inaccuracy/ grenade thrown poorly/ melee misses /double loot / more criticals given/ less criticals taken / enemies more likely to hold equipment in best condition / finding better condition weapons
-Near Invulnerable Boss enemies: Some characters as bosses [should probably mention by dialogue, or from information gained on quest] that so & so is thick skinned against melee, or he moves around so fast you cant shoot him, or hes got a special shrapnel vest that reduces explosives, or he likes to use alot of covering fire, or hes got suicide bombers at his disposal, or hes a battle hardened monster that moves really slow but will split you in half if you get anywhere near him, or a stealthy sniper who disables your limbs with every shot, or some mad scientist who fuesd his brain with a roided up deathclaw mother
Just some thoughts