Mercury in Sagittarius wants to contribute to the conversation around them as much as possible. They have a lot of opinions that need to be expressed. If you are talking about a subject that Mercury in Sagittarius has a deep belief about, their interest will peak up and they will share what they think.
Mercury in Sagittarius have a naturally idealistic manner of thinking. They are not the type of people who have to manifest positive thoughts, but it comes rather naturally for them. Mercury in Sagittarius thinks the best in the people and situations around them.
Mercury in Sagittarius has a naturally idealistic view on life. When they are talking to people, they are looking for the other persons good intentions instead of the bad ones. Mercury in Sagittarius will always find the good in what people are saying that is often overlooked.
Mercury in Sagittarius has a hard time focusing their attention for too long. Their brain likes to jump around from topic to topic. They do not like go stay on one topic for too long. When trying to concentrate, Mercury in Sagittarius brain will usually find something that peaks their interest more and start to think about that.