This is an awesome looking Nightwing. The Batman Batcave has the cross hatching and it looks great in my opinion.
Either way, it is on the verge of selling out.
Why is hatching a good technique?
While using hatching or crosshatching in a drawing can create a variety of textures, the technique is mostly used to create a full range of value. The placement of values within the work leads to the illusion of the form of the subject as well as the illusion of a defined light source.