From the outset, these two characters were complete opposites. One was red and hairy, and the other was probably paler and smooth-skinned (Genesis 27:11). One enjoyed the outdoors with all its activities, while the other felt most comfortable indoors, perhaps engaging in more studious enterprises. Esau seems to have been driven to pursue one particular enterprise, hunting, with all of his energy, and he was no doubt quite skilled in it. Jacob, however, is described as a "mild man," which in Hebrew suggests he was a complete person, that is, he had a well-rounded personality and could divide his energies among a number of projects and interests. He was a man of great ability in several areas.
Richard T. Ritenbaugh
All About Edom (Part One)