Analysts

They embrace rationality excelling in intellectual and technological pursuits. They have a drive to understand and create and have no problems switching between speculative and solution oriented approaches to whatever problems are at hand.
The biggest pitfall is that their intellect can give them a false sense of accomplishments.
They are often insatiable readers as well. They can be found stockpiling books, and driving conversation across fora on the Internet.
They are often relentless self-improvers. Once they recognise a flaw, they apply the same desire for result to make it right.
Summarily, they love their work when they can come up with innovative new ideas and inventions.