Over a nineteen year period I can say that I have definitely changed in appearance considerably. My personality changed under the influence of female HRT from a type A to an almost type B meaning I'm more laid back and easy going and as others have said, more enjoyable to be around and not the prick I used to be. Internally I can say for certain that my thinking slid from one end of the spectrum clear to the opposite which frightened me initially and I de-transitiond for a short time because of it, which I now regret.
Yesterday I emailed my old hunting buddy in Eastern Washington an updated photo, I haven't seen him in several years so I was coming out to him for the first time. He was quite accepting and said he had his suspicions that something was going on when I showed up for an Elk hunt wearing earrings. I haven't hunted or fired a weapon in several years, I've simply lost my interest in those things. I opened my gun locker, there were spider webs in there and I cleaned them out, evicted the spider and gave the firearms a light coat of oil inside and out and locked them back up. I only keep them now just because I can, but really don't have any use for them now.
My circle of friends is now predominantly cis women, previously I had zero interest in women's conversations about relationships, hair and clothing styles, recipes, kid problems, periods, mastectomies, discussions about emotionally unavailable men, and what a bitch so and so is. Yes, I'd say that transition has changed me to the point where I'm not the same person I was before, I am better, ask my wife she agrees!