Childhood favourites included Fraggle Rock and Danger Mouse. Danger Mouse seems dated now, but I still love Fraggle Rock. I enjoyed The Raggy Dolls too, and the theme tune by Neil Innes is great.
Also some of the classics like Bugs Bunny, Pink Panther and Tom & Jerry.
Some episodes of Futurama, The Simpsons, American Dad and Family Guy are brilliant. I've watched a couple of Disenchantment trailers, but based on those it doesn't appeal to me.
I saw a cartoon aimed at very young children (I guess). I can't remember what it was called, but it had quite a few Game of Thrones references (including the music) and I enjoyed that.
If Wallace & Gromit can count as a TV series, it's unbeatable. I wasn't a big fan of the film, but the shorts are pretty much perfect. I also really enjoy Shaun the Sheep.