Gathered End Asymmetric Hammock
This is by far the most prevalent camping hammock design. It is named for its two most distinct features:
- Its ends are gathered into a single bunch, and
- It has an asymmetric shape (i.e. not symmetric) that allows the sleeper to lay diagonally to its center-line, which is a flatter sleeping position than the banana-shape of the center-line.
It’s important to note that the diagonal sleeping position is enabled not just by the asymmetrical cut, but by the width of the hammock. An excessively narrow hammock, even if it is asymmetric, will not have enough material for a flat-ish sleeping position. There are two main advantages of a gathered end asymmetric hammock over the other common design 
Hammock Camping - Part II: Types of backpacking hammocks, and spec comparison to ground systems - Andrew Skurka