3 was bethesdas first fallout entry in the IP and their second leaning hard on the already aging gamebryo engine and they did a great job with it. with iron sights and some minor fixes its actually a really great game outside of the story. story in bethesda fallout titles is never great, so i dont consider it when i weigh 3.
3 and 4 are not equal, 4 was great visually but the story was so fucking stupid it makes me not really want to play it. i have an ongoing survival i should finish on deck and i probably will after botw.
fallout 3? ill replay a bunch because its interesting to me and it tickles the old style itch without having to sink hours into morrowind or oblivion