Upcoming Hybrids Why Does The Typical "hybrid" Have That Ugly Flat Bulky Back End?

Why does the typical "hybrid" have that ugly flat bulky back end? - upcoming hybrids

I am talking about the Toyota Prius, the new Honda Insight and Chevy Volt to the next!

They have this great house back-end ugly, what is wrong with that?

I think Ford has done with the new hybrid-fusion, at least, looks like a normal car! What is almost as good as the other hybrid MPG!

Why the producers make their hybrids so ugly?