Well, because The Wizard of Oz is one of my top 5 movies, that is the one that I first remember seeing Judy Garland and my impression was how fully she commanded each scene she was in - even at her young age. She had a maturity about her even though she was portraying a young girl. How talented she was!
In seeing the later films she was in, I think I underestimated her talent. She was certainly not just a child star with brief stardom - she was an exceptionally talented woman. I was shocked to realize that she never won an Academy Award. I certainly think she was deserving.