Fallout 3 was my gateway drug, too. New Vegas had it's flaws, especially on release before patches, but it was amazing. 4 was a bit of a letdown with the changes in art direction and story. 76 has had continual upgrades each season expanding the options for things to do, new NPCs, and a growing story. I can see why people were mad when it launched as just a skeleton of a game, but it has been fleshed out and it's properly a ghoul now.