I looked back at some GoTY awards at the time and LittleBigPlanet was pretty big at the time it seems. #2 on the Neogaf list and #4 on the aggregate of all awards. Seems like opinions have shifted pretty hard on it. Of course, it had a sequel which might have been better, but I rarely hear people talk about that game either.
Persona 4 on the other hand has certainly become a lot more popular, although I’m not sure how big the difference is between vanilla and Golden.