I know a lot of people didn't like the last episode but I thought it was kind of cool how the challenges showed how much Sherlock had grown emotionally. He tries to be comforting to the child on the plane. He knew she was scared and he genuinely wanted to help. In S1E3 when the child was on the phone he waited to give the answer until the last second because he was more interested in the drama than the child. The three brothers. He got the answer right, but he was upset that she killed them anyway. Remember in S1E3 after the blind woman was killed he mentioned to John, I still got it right though. And that was enough for him. Molly Hooper. He was devastated that he had to hurt her. In S1E1 he takes advantage of her flirtation to get extra time in the morgue. In S2E1 he realizes that the present is for him and he feels bad that he has embarrassed her, but he was slow to get to it and quick to forget it. His sister. His parents commented that Sherlock had always been the grownup. I'm assuming that's because of the three children he has the highest emotional intelligence. This would be surprising if solely looking at S1E1, but by S4E3 it's so obvious Anderson could see it. It would have been so easy for him to not care, to lock her away on some island and forget about her, and no one would have blamed him. But instead, he chose to empathize with her. He felt bad that she always felt alone, that she was scared of her own mind. He chose to be not only her brother but her friend. He's kinder than we expected.