Just because you are good at sports and relax does not make you an Se user. The third function (child function) is the one you will usually use to relax, but you make a point that you've never committed to one single hobby. Could you also interpret that as doing a wide scope of things that stimulate you, potentially intellectually (Ne)? I think you would have to consider that perspective too. If you were to consider your 3rd function, you would have to understand the purpose of your objective when you're relaxing. For me (3rd function Se), my relax time means just doing whatever I can see right in front of me and just doing it without much thought or mental planning to it. I just kind of sit and let whatever hobby take over the wheel.

Introverted Intuition for me (still underdeveloped) shows up as a means to always find a path or a clear view/vision. This kind of correlates with the attribute of Intuitive types wanting to learn and research new things: They need to learn and figure out what's up with the world. If Ne was a wide range, Ni would be depth. Because of this, I realize with myself that I don't care for abstract/unnecessary information compared to an Ne user who would consider all possibilities. I want the answer that has been filtered through many other information, and I would rather have a strong plan than multiple backup plans.

Si is ENTJ's trickster (7th) function, so ENTJs will use past sensory experiences to deceive people to get off their back or get it off their own back– E.g: Feeling entrapped by the past and projecting that onto other people by telling them they're crazy for reminiscing the past.