I see from a comment by Howard that I may not have been clear about my L/C brain concept. I'm not suggesting that there is one key characteristic that separates L-minds and C-minds. A dominant local-versus-global point of view is only one that I suggest. Here's another that may prove interesting. I think there's a difference in persistence according to my observations. Although this C-mind is very persistent in personal goals, I fatigue easily when trying to accomplish a communal objective.
For instance. I speak French fluently, although it took me fifteen years to accomplish that, having no real gift for languages. I've worked at oil painting for all my life, taking a month or two on average to complete one painting. I'm still not any good, but I persist. One the other hand, in a committee or public situation, I can debate opponents for one meeting. If the decision is postponed for further discussion, my tendency is to lose interest. My impression from university internal politics is that L-brains can persist forever. What is your impression in this domain?