If you're going to bother with Fallout 3 at ALL, I'd suggest you buy it for the PC. They're going to be releasing the G.E.C.K. soon, so I imagine user created content is going to save the game from being abysmal. It was the same with Oblivion: honestly, it was full of buggy shit, and then, using the TES Editor, tons of mods popped up that saved the game from sucking really, really hard, from bug fixes to revamping the water engine, to adding quests that are more incredible than half of the stuff in the game itself.
Beyond that, I BRING NOTHING TO THE TABLE, mostly because I've not bothered playing the VC demo yet.