Eletronic Device Design

Here are my designs for how to make our electronic device look so far.
My first one was the drawing second from the bottom. I started with a more square shaped idea than the others. I wanted an area at the sides for the users to be able to grip onto it easily with.
My second design was the one on the bottom, I decided to make it rounder, made with a rubber outside on them and thinner in the middle so its even easier to hold when hands are very sweaty. I also want them to be shaped similar to a healthy persons body. My next design was the one at the top, I think I have gone too far inwards on this one. I then created the second from top drawing. This is my favourite design but some other people have liked the bottom right one most, I will carry on getting other peoples opinions.