As a Sun Gemini, with Mercury depositing it in 8th house. I am not truly happy unless I am involved in a mental challenge.
Life challenges tends to thrill me on the one hand, and scare me on the other, with both feelings operating simultaneously. That may be the double personality at play, or it could be my strong Uranus placement.
Here is what I think is the strong point of Gemini placements:
What earth signs typically see are the dramatic side, the 'scattered' Gemini that frequently complains about the drama in their lives and gives off a ditzy vibe. Yet what they fail to understand is the other side that are actually thrilled with curveballs life throws at them. Challenges fuels them, it doesn't defeat them. And without it, life is listless and grey.
Geminis do not process challenges pessimistically. On one hand, nothing they complain about are actually taken seriously. They simply enjoy expressing themselves, and are too detached to be weighed down by it. On the other hand, life struggle are processed as exciting stimulants and puzzles to solve. This ensures an always upbeat, mentally-on, and hopeful outlook.
I lost count of the number of times my more methodical acquaintances (frequently Capricorn heavy) underestimate Geminis solely based on the surface. Appearances and styles are deceiving. When it comes time to deliver results, they are promptly shocked at how organized, detail oriented, practical and substance driven we are, without all the unnecessary moaning and heaviness, while making it look easy.
Weakness:
Because Geminis are so good at thinking on their feet, they excel at situations and jobs that deals with constant stimulation, such as sales, emergency problem solving, even disaster relief...they often suck at anything that requires consistent routine and monotony. It literally drains the life out of them.
I've found any job I have must have variety and allow ample opportunity to think on my feet to problem solve. As soon as routine and monotony sets in, I feel fenced in. In a situation where I am no longer learning and expanding intellectually, that's usually a signal for me to leave. It usually doesn't matter how well it pays, its a drain to the spirit. I suppose security isn't as important to us as earth signs, and pure gemini energy don't have the ability to trade security for boredom.
As entrepreneurs, Geminis are more likely to build a business for a couple of years, then sell it, and start off in a new venture all over again. Without earth signs or a strong Saturn anchoring it, its harder to build and put in the focus necessary for payoffs a decade or two from now, which Capricorns excel at.