Hi,I'm Japanese woman.
Better to watch to learn the language is "Tonari no TOTORO_My Neighbor Totoro" I suppose.
Dialogue the characters of Totoro are talking about based on simple words how a child remember it easily and secure."Slum Dunk" is also good if you are be intermediate,there are many good speech in this work.

I don't recommend of that for beginner is "Rurouni Kenshin" which is something used very very traditional and difficult Japanese words as Samurai speaks,and also "EVANGELION" I don't because of it what characters are talking about is something complex to understand the meaning though the word which is used mainly is easy.