There are plenty of quest that can be solved in different ways along with the main quest having different endings and fates for the three main factions.
In fact it's ah higher number then FO3. FO4 is not as good as 1,2 and NV, but it's hell of alot better then FO3.
I'm not that far along yet, but are there alternate paths to dealing with the raiders at the Museum of Freedom and/or the Corvega Factory, or is a big shootout the only option? It sure didn't seem like there was any alternative.
One thing I did on my last FO3 run for role-playing purposes was to wait until fairly far along to shoot back at raiders, Talons, hostile but non-feral ghouls, or any other enemy with a modicum of intelligence, instead trying to run away or hide whenever possible. I didn't think a 19-year-old would be too readily accustomed to having to use lethal force on a regular basis, and when I did eventually start to fight back, I only did so in self-defense.
I get that, in the case of FO4, the male protagonist, at least, has apparently been a soldier, but I still felt like there was a bit of shortcutting and assumption of the player's familiarity with Fallout lore even if it doesn't make as much sense for the character. I, as a player, know that the Raiders are almost certainly the bad guys when I come across them in a firefight with other humans, but how does my character know that? There's also been almost no discussion of what exactly ghouls and Super Mutants are, even though I have come across both so far, including a ghoul doctor who's trying to run a business from the middle of a radiation "hot zone." Maybe I missed a radio broadcast or an early dialogue choice with Preston or something, but I feel like I'd be kind of confused by some of this if I'd never played a Fallout game before.