Yeah, Fallout 3's main questline blows. the good stuff is all in exploring the world and doing the sidequests.
BTW, i had the same problem with Fable 2. try an install to HD, that's the only way i could get it to run.
(and Fable 2 sucked, BTW.)
As for me, i finished Persona 4 a few days ago (with the True Ending this time) and that was just a fantastic game overall.
Also finished Space Invaders Get Even on WiiWare, but the "game" i DL'd was barely a 15 minute demo that cost me $5. evidently all of the real content is on separate "mission packs" for $5 each, but i'm not going to reward such an abuse of DLC and the Wii's no-demo system with any more money.