All I want from Fallout 3 is the same freedom that I had in 1 and 2. Being able to kill, have sex, abuse every living thing on this god given Earth.
And! Let's not forget the awesomely awesome storyline along with the great gameplay and all that jargon mumbo jumbo. It looks like it has some pretty sweet graphics, so that's good.
Example from Oblivion...
I just want to be able to freely and at will (And this is just a shining example of my sickness) pull out my shining sword that will be the bloodletting of the town. Run around and chop widly into the calm air with a seething maniacal look on my face that screams horror from every living orifice, and proceed to slice meat from bone and scrape the bone in the process. I just love the way that grinding sickening scraping flows through my sword and into my own limbs and feeling that raw power surge through my blood. I turn around and guards are standing there ready to take my fiendish hide out. So I run at them in a full blood frenzy, my sword high in the air, my face pelted by the wind rushing across it, and my feet smacking the ground as I rush headlong into sure doom- oh sorry I'm getting way to into this.