>>149441536 (OP)
Billy and Mandy has weak character dynamics, it’s style is a lazy rendition of the UPA look, and it ripped off Ren and stimpy’s humor. Fosters, while not perfect, and least made good use of its setting and had plenty of decent jokes inbetween the meh ones.
>>149441536 (OP)
Grim Adventures mogs but KND, EEnE, and Courage were like the holy trinity. If we're allowed to count Toonami originals I'd add the original run of Samurai Jack and Megas to create a top 5.