I played Fallout 3 and 4. 3 felt like one of those games I would only play for a little while each day and then stop. It felt like watching a t.v. series with how much I played it. I played a lot of it just wasn't something I could play for hours and hours. I played 4 and hated the dialogue tree enough to quit. I wasn't also super into the base building aspect either.
I need to play new vegas but that came out around the time I played 3. I have both 1 and 2 but never played them. I should get to them sometime but I've been playing 4 lately and modded the hell out of it which also made the base building a bit better and fixed the dialogue options so I can tell what I'm responding with.