Mercury in Gemini
Gemini is the natural home for Mercury, and the placement produces pure logical reasoning of the highest order. This Mercury denotes a lightning quick thinker. Your concern is with fact and unbiased understanding, rather than personal preference. Communication is easy, rapid, accurate and often eloquent. You are an interesting and incessant conversationalist. Mercury is at its quickest and best when it resides in Gemini.
If given proper training, you excel in mathematics as well as in language. You are very logical, and your mind moves very quickly. You love logic, a fact making you an excellent teacher or reporter.

When engaged in arguments, you may miss a basic premise, but you are clever enough to win anyway. The opponent is convinced by your rational remarks. You have a great variety of interests, and your mind may flit from one idea to the next, never digging in very deeply. You have an intense curiosity leading you to want to know a little about nearly everything. This makes you a very interesting person, but rarely an expert in any particular field.

The down side of Mercury in Gemini is the sensitive nervous system often noted. It's hard for you to shut out external stimulation of any sort. You may find yourself being forced to deal with too much activity and too many impressions from time to time. If you allow yourself to be subjected to too much stress and too many demands for an extended period, you can become frazzled and subject to breakdown. The obvious signs of this problem are irritability and mental confusion. The root cause of this is simply spreading yourself too thin. Getting away from it all generally provides a quick cure.