The thing Geminis dislike the most is feeling stagnant. Whether it's within their jobs or relationships, if they're not mentally and emotionally stimulated, they're a flight risk.
Scorpios are intensely passionate and fiercely loyal, but if they are betrayed, they will either cut you off or enact revenge in a way you can’t imagine.
Scorpios guard their emotions well and are very secretive. You need to work hard to earn their trust, but once you do, you can ask about their feelings, and they will be honest.
A Sagittarius will often guard their feelings behind humor and a lighthearted attitude, and their constant need for adventure often leads to difficulty with commitment.