lol yeah the weakest bit of Fallout is the main quest. If you think you might dig the exploring and sidequests, do the stuff at Tenpenny Towers, the stuff in Canterbury Commons, everything in the DC ruins, The Replicated Man from Rivet City, Shoot 'Em in the Head from the ghoul in the Underworld, Reilly's Rangers from the girl in the infirmary of the Underworld, Oasis at the top center of the map, the slave quests at Paradise Falls, and the DLC stuff if you have any of it. I'm probably missing a bunch but those were most of my favorites. Collecting all the bobbleheads and crap was a nice way to explore new areas too