Left-Brained is generally logic, grammar, language, and hard facts.
Right-Brained is generally creativity, vocabulary, arts, and convictions.
Which one are you, mainly? There isn't really an official test on this, but I took an internet quiz that was made by some university and it says I'm right brained. The summing-up of right brained it gave sounds a hell of a lot like me as well.
What are you??
By the way, everyone is technically both. But each shines a little brighter in each person. Don't be a richard-in-the-mud :P