Interesting question! Let's see... I think Spice and Wolf could be reanimated. The plot in itself is good and it follows the novels pretty closely, but I wish the character designs were redone so that they looked more similar to the ones used in the novels. I would also like some studio (Kyoani I'm looking at you!) to continue Full Metal Panic since the ending was never animated. And y dream is to have an anime adaptation of a manga that I love called 3am Dangerous Zone. It got adapted into a drama that I was sadly never able to watch because it only came out for cellphones. It will never happen, but hey, a girl can dream XD