Originally uploaded by andi watson.
One of my favorite comic artists and graphic novelists - Andi Watson - has a Flickr page where he lets his fans behind the scenes, with glimpses into his sketchbook and ongoing projects.
He's incredibly talented and the nicest guy - every year at the big San Diego Con I would get him to sketch something for me. He can do all genres, but he excels at everyday people in everyday situations. But I also like his fun stuff, like these sketches of Buffy characters using the "super-deformed" style popular here in Japan.
You can find his graphic novels on Amazon, just search his name. I've even posted reviews there for a few of his books.
And click on this link to see more from his sketchbook.
He uses few lines and his work is often presented in black & white, but his sense of style is amazing, and his composition and use of negative space is fantastic.