The Witcher 2 probably fits this best as well as Uncharted 2. Maybe Dark Souls? But I don't think people who played Demons Souls were like " yeah it was pretty good but had a few flaws so I'm hyped for the next if they can fix A,B, and C". It was more like "OMG THIS GAME IS THE TITS! I CAN'T WAIT TO PLAY DARK SOULS!!"