I found this article in Wired Magazine on the net that discusses two creative types: Conceptualists and Experimentalists.
The idea was new to me. I hope it's not old news to most of you.

“Picasso and Cézanne represent radically different approaches to creation. Picasso thought through his works carefully before he put brush to paper. Like most conceptualists, he figured out in advance what he was trying to create. The underlying idea was what mattered; the rest was mere execution. The hallmark of conceptualists is certainty. They know what they want. And they know when they’ve created it. Cézanne was different. He rarely preconceived a work. He figured out what he was painting by actually painting it. “Picasso signed virtually everything he ever did immediately,” Galenson says. “Cézanne signed less than 10 percent.”

Experimentalists never know when their work is finished. As one critic wrote of Cézanne, the realization of his goal “was an asymptote toward which he was forever approaching without ever quite reaching.”

Of course, not every unaccomplished 65-year-old is some undiscovered experimental innovator. This is a universal theory of creativity, not a Viagra for sagging baby boomer self-esteem. It’s no justification for laziness or procrastination or indifference. But it might bolster the resolve of the relentlessly curious, the constantly tinkering, the dedicated tortoises undaunted by the blur of the hares. Just ask David Galenson.”

The entire article can be found at the link below.

http://www.wired.com/wired/archive/14.07/genius.html?pg=1&topic=genius&topic_set=