If you like RPGs but don't like Fallout 3, then you are not a true RPG fan!
But anyways Fallout 3 is simply the **** You can do whatever you want, whenever the freakin hell you want to. Wanna run around and kill an innocent person? Go for it. Wanna do a side mission and a story mission? Do it. Wanna nuke an effing town? You gotta do it.
Pretty much everything about Fallout 3 is awesome. You can make your character however the crap you want to and the game looks so amazing with all the blood and eyeballs popping outta heads and all that stuff, but seriously this **** is violent and that is what is so damn cool about it.
So there are all kinds of weapons, perks, and stuff to do so if you get bored then you don't know how to play RPGs and should go fall in a hole and never come back up because you can't not play this game.