The whole Fallout line is worth a playthrough, but you really have to enjoy sandbox games (REALLY enjoy them) to get your money's worth out of Fallout. The main storyline/quests are usually pretty short, but always very interesting. And again, if you enjoy exploring and having the choice to do hundreds of side quests apart from the main story, you'll have tons of gameplay time with any of the fallout games. Definitely have to like shooter games to enjoy these as well. The pre-post-current-apocalyptic settings is one of my favorites, which is why I really enjoy these games. If you feel the same way, Fallout is probably for you!