Your brain has been altered, neurologically rewired as it acquired a skill that your society greatly values. Until recently, this skill was of little or no use and most people in most societies never acquired it. In developing this ability, you have:
Specialized an area of your brain's left ventral occipito-temporal region, which lies between your language, object, and face processing centers.
Thickened your corpus callosum, which is the information highway that connects the left and right hemispheres of your brain.
Altered the part of your prefontal cortex that is involved in language production (Broca's area) as well as other brain areas engaged in a variety of neurological tasks, including both speech processing and thinking about others' minds.
Improved your verbal memory and broadened your brain's activation when processing speech.
Shifted your facial recognition process to the right hemisphere. Normal humans (not you) process faces almost equally on the left and right sides of their brains, but those with your peculiar skill are biased toward the right hemisphere.
6. Diminished your ability to identify faces, probably because while jury-rigging your left ventral occipito-temporal region, you impinged on an area that usually specializes in facial recognition.
Reduced your default tendency toward holistic visual processing in favor of more analytical processing You now rely more on breaking scenes and objects down into their component parts and less on broad configurations and gestalt patterns.
What is this mental ability? What capacity could have renovated your brain, endowing you with new, specialized skills as well as inducing specific cognitive defects?
The exotic mental ability is reading. You are likely highly literate.