Fallout 3 was shit. Bethesderp makes fake RPG which are more casual sandbox games, they ruined fallout for me. New Vegas was alright, and it was actually developped by Obsidian, the original guys from the studio at the origins of Fallout.
Imo, Fallout 4 will be average and they go all in the com' / marketing, everybody's aboard the hype train so they're gonna milk that shiet with pre-orders.