I'd like to sperg a little about my favorite Fallout games and DLC, and at the end of this post will be a Fallout 4 mod I made the types who enjoy 'build anywhere in the Commonwealth" settlement builders will enjoy.
FO1: Good game. Kinda a pain in the beginning, but it gets easier with some practice and a bit of luck. Story is actually pretty good.
FO2: Even better than the first, somewhat easier to get into, though the tutorial temple area is probably the most stupid thing ever (though from what I understand the creators were forced to include it). Even better story, love the comedy parts especially.
FO3: Story is cookie cutter and kinda boring, at least the main story is, though some of the side quests are pretty good. Still think it has amazing set design and really gives the impression the whole world was nuked to hell and back the best of all the games.
F3 Project Anchorage: AKA Fallout as Call of Duty. Yawn. The loot is pretty nice and hilariously broken in a good way though.
F3 The Pitt: Liked it, good morally grey story, but it was too short and should've had more areas to explore.
F3 Broken Steel: Eliminates the worst parts of the original game ending, actually lets me play after the ending, loved being able to continue ruining the Enclave's day.
F3 Point Lookout: The FO3 DLC that was the best IMO. Decent challenge, good plot, and nice loot all in one.
F3 Mothership Zeta: Fun for the novelty, but the plot was forgettable and ultimately wasn't all that great in hindsight.
Fallout New Vegas: Felt like a proper sequel to Fallout 2, can't really knock anything about it save for the bugs, which are, no pun intended, legion.
FNV Dead Money: HARD, in a good way. Felt like Resident Evil, Fallout style, done well, good plot.
FNV Honest Hearts: Nice change of scenery, good story.
FNV Old World Blues: My favorite DLC, hands down. Hilarious and horrifying story in equal measure, pretty hard at low levels though.
FNV Lonesome Road: Nice conclusion to the DLC story arc, made ED-E more useful. Hard, but not as much as the other DLC if you go in at high levels.
FNV Gun Runners Arsenal/Courier's Stash: More equipment. Nice, but not worth it by themselves.
Fallout 4: Main game is okay. Better than Fallout 3's story, but not as good as New Vegas.
FO4 Automatron: Fun but short. Do love the robot crafting, though.
F04 Wasteland Workshop/Contraptions: Adds some nice stuff to crafting, but otherwise boring if you don't care much for it.
F04 Vault Tec-Workshop: Nice Fallout Shelter tie-in, fun in limited doses.
FO4 Far Harbor: Pretty fun, better dialogue options than most of the main game, and focuses on Nick Valentine a LOT, my favorite main game companion.
FO4 Nuka-World: Until this came along, even Fallout 3 was better at letting you play the villain if you wanted to, while the stock FO4 made it very hard to be a total prick without just going on a total murder spree. And even as a good guy it adds some cool new places to explore, some nice gear, and some more crafting options.
And since this is a mod I play extensively and even got acknowledged as awesome by Obsidian:
Tale of Two Wastelands: Fuses the worlds of Fallout 3 and Fallout New Vegas into one game. Adds most of FNV's better aspects to FO3, and since it uses the FNV version of the engine, Fallout 3 is actually more stable in many areas. It's already pretty good at version 2.9, 3.0 is coming out soon.
And now, if you could bear all my sperging, if you adore settlement building in Fallout 4 and want to build anywhere in Commonwealth you choose, I made a mod that makes it to where you can do just that in all exterior world areas without INI tweaks (that have issues of their own) that goes great with "build anywhere and everywhere and rip down whatever you feel like" mods.
https://bethesda.net/en/mods/fallout4/mod-detail/3966908
http://www.nexusmods.com/fallout4/mods/22283/?