Because Rivet City is so awesome right? Lol...
Rivet City wasn't advertised as the highlight of the game though...
@OP Fallout 3 can be summed up in two words...Mothership Zeta
Try again, Mothership Zeta is a terribly poor example of what Fallout 3 offers (I love Fallout 3 and hate MZ).
Better to say that Fallout 3 can be summed up with The Pitt or Point Lookout, those two DLC's expressed perfectly what I love about Fallout 3.
@OP Two words...Metro Tunnels......nuff said.
Thanks. The metro tunnels are awesome (no really, ask anyone who likes Fallout 3 and the metro tunnels are usually a favorite of theirs). They were missed in New Vegas.