Never played the DS series, but I enjoyed the demo a lot. Do I need to play DS 1 or 2 to understand or enjoy 3? I have a big backlog which includes Fallout NV, Xenoblade, Witcher 2, Mafia 2 and BL2 so there is a lot to keep me busy. So if the 1st 2 aren't stellar or mandatory, I would just play 3. Thanks