Pencil Sketches... Most basic and useful...
Ink Pen, Focusing on Line-work, rather than tones and materiality...
Colored Pencil... Easy to be controled... Good as rendering skill
Watercolor... More artistic approach... can be very fast... or detailed...
Marker... Quick and modern rendering technique... a bit hard to control...
Ink pen drawings... for detailing and realistic drawings... can be used in various ways...
Drawings for the enjoyment of life...
