Maggie and the Ferocious Beast (the first English cartoon I remember watching), Rolie Polie Olie, Martha Speaks, Franklin, Little Bear, Total Drama Island/Action, and 6Teen taught me English when I came to Canada.
Star Trek got me started on my path to tankiehood and sci-fi writing. Futurama also significantly contributed to the latter.
Pokemon, Wonderpets and Redwall (and many of the cartoons from the learning English category) got me interested in writing animal characters. Zootopia pissed me off so much with its inconsistent world building that it sealed the deal and made me obsessed with perfecting my own fictional animal world.
Family Guy taught me how not to write characters and their interactions.
How It's Made is just awesome and satisfying, no further comments.