Despite the fact I love the game and am still playing it (sunk 3 hours into it last night), I'm going to have to go with FO4.
I'm not saying it's poor, far from it - it's great. However it's nowhere near as good as it could/should have been.
The world feels very empty in a lot of places - I went for a wander last night, and as soon as you get off the beaten track, there's just emptiness. I went through the plane wrecks around the airport, and they are literally bare. No debris, no items (even junk). Would have been nice for there to be a few skeletons around, maybe some suitcases, even destroyed seats etc, but there's just nothing.
There's the same wandering through a lot of the towns; unless you're going to a specific destination, 90% of the buildings are (conveniently) boarded up - there's no reward for exploring (in many open world games, even if there's no tangible in-game reward, there's usually at least some interesting architecture/view, but in FO4 there's just another copy-pasted boarded up building).
Then there's the graphics. When you're in an interior area looking outside through a "window" - it looks like a PS1/N64 game in some places! Some of the textures (especially on character models) are dire - Virgil is a prime example of this.
I think it's a great game, but it could have been so much better; it feels like an expansion for FO3 a lot of the time (in itself not a bad thing, but 8 years later you would expect a bit more)
