Depends. The chibis are, by far, the easier ones to edit. Making a diverse range of poses is more manageable when there are only a few pixels of body space. Better for making games with lots of movement/expression. But the taller sprites do have more appeal, they show off more of the character design on the maps and help make the game's world feel more grounded. They are better suited for more atmosphere heavy games. Actually, the real god-tier sprite designs are the 2k/3 styled charsets. They could end up being the best of both worlds if done right.