Early on in my artistic development, I fell in love with Berol PrismaColor Pencils. My medium of choice if I need to express color, gradient and non-true blacks.
12x10 Berol Primacolors
30x20 Berol Primacolors
15x10 12x10 Berol Primacolors, Green Study
15x10 12x10 Berol Primacolors, Shading Study
I drew this up one day soon after the original iMac was announced. In hindsight, I should have called it the iPhone, patented the telephony connectivity and registered the name and domain. I'd be a bazillionaire now.