If you are applying for an artistic role, drawings are quite valuable to a prospective employer. An animator’s drawings might show an understanding of balance, weight and movement. A modeller’s drawings can show an understanding of mass and proportion. Photography is a great study for lighters, and the design, layout and composition of photography, painting and drawing can be helpful when looking at a compositor’s work.
Even if you aren’t applying for an artistic role, such as Software Development or a Technical Director we always like to see your ‘artistic’ side.
Variety of styles is the key, unless the Company you are applying to has a particular style.