I always noticed and liked his smirk/smile on just one side, and we saw it often enough in his show. I felt it expressed that, for various reasons we saw, he had a hard time letting himself be fully happy. The last scene of the series with him, Karen, and Foggy having a drink, with the whole Kingpin thing apparently settled, he was smiling and relaxed . I thought his appearance in She-Hulk carried on that relaxed, happy Matt.
Charlie Cox really expresses a lot with his face. He's great to watch.I could go with another Defenders series with Matt, Jen, Jessica, and Luke. I read somewhere Finn Jones throwing out the idea of a Heroes for Hire series; I could go with him too if the writers could handle him the right way.
I had no problems with the way Danny Rand was handled on Netflix, especially since Season One of "Iron Fist" is one of my favorite seasons of that franchise. Both Finn Jones and Mike Coulter had great chemistry and I would have loved to see them together in a "Heroes For Hire" series. As for Daredevil's appearance in this series, my feelings are . . . . eh. Aside from Season One, I was never a fan of "Daredevil".