Total War - Medieval and Shogun were fantastic, catering for a small number of people who liked substance over shiny things. Rome was an anjoyable Arcade Game, something to play while listening to pop music :P. Medieval 2 was unplayable and it stayed that way ever since...

Fallout. I dont think Fallout3 was a bad game. It was a fine post apocalyptic game. But it wasnt Fallout (during my latest replay of fallout 2 I played a married female lesbian character who sold her spouse to slavery....try to do that with F3...)