Who am I?

On a trip to St.Louis recently, I took a personality test in the airport. I remember taking a personality test about a year ago or so and receiving expected results. I believe I was an ISFJ, which according to this website (https://www.16personalities.com/personality-types) meant that I was what they described as a "defender". You know, a very kind and dedicated person who will give anything to defend those they love. I remember looking at the results and immediately agreeing with them. I agreed I had this overly kind and sensitive identity that made me want to take care of my friends and family at whatever cost. See, I already knew going into the test the first time that I was this kind of person but it's quite an interesting thing to have a test confirm those ideas of yourself and then go into detail on who you are, when you may not even realize there was so much more to your identity. Yet, even with this information about myself, I chose to take the test again. I figured that since I'll never stop growing I may as well see how I've grown. And it was interesting to me because I actually changed a little bit. I received an ENFJ, referred to on the site as a "protagonist" or someone is a charismatic leader who is able to mesmerize their listeners. This change in personality type wasn't incredibly surprising to me, though, for two reasons. The first reason being that I already knew I had greatly changed over the past year and a half. The second reason being that the last time I took the test, I had almost a perfect 50/50 score. So when it comes to trusting these tests or agreeing with these test results, I grow very wary. Indeed for me it is interesting to see what others, like this site, think of the human mind, how it functions, and particularly how specific people function. Yet, even though I look at those test results with baited breath and excitement, I know that the site won't tell me anything magnificently new or interesting about myself, my brain, or my personality. All in all, I disagree more with the second result than the first, but I truly won't put all of my eggs into one basket, or 4 letters, as it were, in either case.