Yeah, for me, Fallout 1 and 2 are the definitive Fallout games (ignoring Tactics as I never played it). I felt like 3 and onward were like Elder Scrolls total conversions, and I always saw them as "spiritual successors" but not exactly cut from the same cloth, or something. Like, same universe, but very different style and feel, and far less memorable or influential to me. Of course I played the first two games at a far more impressionable age, but the actual atmosphere of the games was a lot more gritty and impactful, even comparing the "eras" today.
It is said Bethesda was kit bashing the initial titles.
Griefers don't get mad... we all know it is true =3