Poll: The Evolution of Sheldon Cooper

Much can be said about Sheldon Cooper - the most iconic character of The Big Bang Theory (2007). From the start, he is characterized as arrogant, narcissistic and selfish, completely unable to relate emotionally with other people. He does not understand sarcasm, has no social skills, and sees himself as superior to everyone else, including his friends. Basically, a very annoying person, seemingly impossible to love. But during twelve years we have slowly watched him evolve into a more affectionate and "human" character. And now, he is far from the emotionless robot we were first introduced to. So, which of Sheldon's emotional or physical milestones has been your favorite throughout the series? NOTE: This list contains spoilers Discuss here