I like all of the 'main' series Fallout games. I'm an uncultured peasant, and I can't stand the turn-based gameplay of Fallout 1 and 2, but I still like them enough to try them.
I can't help but feel the elitism is strong here today. For all of their flaws, the Bethesda-published Fallouts, and their games in general, are near the tip top of my gaming pantheon simply because how much I enjoyed myself with them. And if one can't understand how or why I did so without mods to make those nightmare doll-faced NPCs less plastic looking, then I can safely say the flaw isn't on my end.
EDIT: Also, I might be a little biased. Fallout 3 kept me sane the months I spent bedridden post-spinal surgery in late 08-early 09. Those were some rough times, and roaming the capital wasteland was a godsend of a respite.