Just beat Fallout 3's main campaign again. I think the biggest difference between Fallout 3 and New Vegas is that there's a clearly defined narrative experience you're supposed to have in Fallout 3. There's a few choices you can make along the way within the framework of the main quest lines story but those decisions don't really change the experience much. Blowing up Megaton didn't make your idealistic father revile the wanderer and cast him out. Nothing really changed except one line of dialogue, he was disappointed in me, disappointed I callously nuked a small town for a nicer apartment but my father loved me all the same. The quest line continued on the same as if nothing happened.
One thing that really bothered me was there are no factions to align yourself with in Fallout 3. The Brotherhood of Steel are simply good and the Enclave are simply bad. You don't get to choose between factions or choose none of them in the end. There are no faction quest lines. I guess the Head of State side-quest line where you choose between the slavers from Paradise Falls or the escaped slaves sort of counts. The karma system in Fallout 3 seems completely superfluous, your karma merely changes who occasionally ambushes you if you're not neutral and that ending montage after the purifier is turned on.
The lead up to the ending of Fallout 3 is probably one of the best out of Bethesda's more recent efforts. It's pretty awesome trailing Liberty Prime as it wreaks havoc on the Enclave and spouts propaganda from a bygone war.
Working my way through New Vegas, figured I'd move onto the expansions.
Old World Blues is hilarious and awesome.
Added a bunch of screens to
minus account.(spoilers, obviously)
I loved that add-on, it's just so ridiculous. I hope that the add-ons in Fallout 3 are half as entertaining.