to me fallout 4 was kinda a disappointment...
i love the new power armor. wished it was harder to maintain though. for ex: exoskeleton can get damaged, adds bonus weight when no armor pieces attached (when armor is equipped on the skeleton it weighs nothing), harder to find skeleton and armor (though allow a method of crafting makeshift skeleton+armor)
i love the weapon modding, wished it was more realistic though. for ex: make high tech scopes not craft able. i hate it when i take 9 aluminum cans, 4 alarm clocks, 4 rolls of duct tape, 5 screws from where ever, 4 silver lockets, 3 microscopes, and 2 telephones. a high tech scope like that would take custom made circuits (a telephone doesnt make sense), and better machining.
with the new weapon modding you could say there are many guns you can use but i would like to see far more variety since this was after fallout NV (i miss having the LMG, M14/m4 carbine?, That Gun, random rifles, specific .50 cal rifles, grenade launchers, the classic fallout sniper rifle ect) also weapon progression really annoys me. the game kinda forces you to go from pipe rifle, to 10mm, to hunting rifle, to combat rifle, to plasma rifle, to rail gun due to the increase of enemy's health
i love the base building but it's got issues too... for ex: i step out of the vault looking for my son and im meant to be a desperate father worried about him... na ill just stop by my house and build some crazy pixel art and the whole story goes at my pace (you can wait a year and everything will be the same, and no quests will have failed) that's one of the problems i saw with the story line in fallout 4. also somehow i take 10 forks, and a tree and turn it into a metal wall... or i take a few plungers and somehow i fabricate a wall made of massive truck tires.
the combat annoys me due to the progression of the weapon types. in fallout 3-NV you could be using the first weapon you found till the end of the game and it would still kill, in fallout 4 it feels like borderlands where you progress up levels to fight harder lever enemies, with the next gun. (i would love to be able to use a pipe rifle i found in the beginning of the game but heavily modified, but at later levels it barely kills) also the enemies have just become bullet sponges when you increase the difficulty, and they dont act any smarter.
and the story line just felt far too linear. fallout 3-NV had far more dialog, and the story was much more interesting. i feel that they could have done the same for the common wealth/institute. maybe have more option that choosing one side and having to kill almost all the other factions. also i wished there was a way to convince the institute/Shaun to stop enslaving synths, and instead come out to the common wealth, and help out the minutemen (who i view as the only good faction)
The game was fun for awhile, though for me it didnt last as long as fallout NV (i haven't even played NV's DLCs) to me it feels like they took a large step from the original first person fallout games, and are heading towards a more general FPS audience.