I really enjoyed exploring the actual capital part of Fallout 3. I would have loved being able to go into more random buildings in the capitol. Just get rid of all the darn sewers. It was creative that it was in the game, but I just didn't like how much time I felt like I spent down there. I gladly would have traded sewers with larger/more open capitol.
I agree.
I'd much rather spend more exploration time outside & absorbing the landscape.