Wayne Thiebaud, I have to say, has been one of my most influential artists. I love the white background, no visible vertical line but there is one there, and shadowing.
A conscious decision to eliminate certain details and include selective bits of personal experiences or perceptual nuances, gives the painting more of a multi-dimension than when it is done directly as a visual recording. This results in a kind of abstraction... and thus avoids the pitfalls of mere decoration. (Wayne Thiebaud)