What can I say? I'm a bare bones kind of guy. Never been big on painting, never been big on inks, sculpting or any of that. To me the most relaxing form of art is a simple sketch. It's a culmination of conscious(and sub-conscious) thoughts, emotions, and inspirations. That's not to say I'm against other forms of art, but the basic, unbound range of sketch work is undeniably engrossing. When doing anything like designing, planning, developing, or assigning, a simple sketch can make life a whole lot easier.
Honestly, when it comes to pretty much anything it all builds upon bare bones. And in this case those bones are sketches.