Character Development
I thought this might be an interesting topic to discuss.
I tend to prefer following characters that are either undergoing or have undergone growth and development throughout their portrayals, in their physicality, mentality, maturity etc.
As IMO, without good development even the best of character concepts can become a mess, while conversely even a really bad concept can be salvaged by strong character development.
So I thought I'd see if people could name characters they think have undergone the most character development throughout their comic "career" and list some of the reasoning behind why they think the character has undergone significant development.