I also got a copy of Fallout 3 GOTY edition, but I uninstalled it after the part where my character left the vault. I like how the game looks, and the story intrigued me, but the clunky combat turned me off.
I know that I need to level up some skills before my character becomes effective with weapons, but the scripting and hit detection really feels awkward, and third person view makes you move like a ghost skating on ice.
