The way you communicate with others involves a lot of things, the words, the facial expressions, the eye contact and the body language. The most important thing is to focus on the body language is that even though your words are friendly, if your body language is dull then your entire image in front of them looks dull. A body language actually shows your mood and thinking. Here there are few different positions which shows who you are:
If you sit on the floor with joined knees but separated toes, it means you are childish and creative. You are energetic and bubbly and a person who is full of life. People may seek your company when they feel bored.
If a person sits with a leg on another, it indicates their creative mentality and an exotic imagination. They are also a dreamer and restless when it comes to handling relationships. People might think differently about their views but its okay because they are born to be different.
If a person sits with their legs apart, it means that they are having very disturbed thoughts and a restless nature. They have trouble concentrating in the work around them but that is because they have their own troubles circulating around them which is not letting them stay at peace. But also, they can overcome their issues by their will-power.
People who sit while their legs are simply straight tend to be more smart and full of etiquettes. They are peace-loving and avoid any sort of drama around them. They stay limited to themselves but also can be outgoing if they need to be. It actually shows that they are a quiet mouse but can turn into a vicious if needed to.
People who sit with their legs turned sideways are smart and career oriented. They set their goals straight and work hard to achieve them. They have high standards and are serious about their grades. They work according to their schedule.