I don't like the character design of season 3. Too childish, weird head-shapes, weird skirts and bubbly hair. There are some episodes where it looks fine though. I thought Yukie Sako's character design was sometimes a bit "ugly" and weird, but I can say the same about Naoko's character design. I kinda like that. Unfortunately the animation and frame compositions of season 1+2 were terribly done. I think I've never seen such a badly made anime. It's a tragedy!