The Flintstones (so cool that they still make them into vitamins! DD takes them! LOL!)
The Jetsons
Loony Tunes
Inspector Gadget!! (He's still cool!)
Tom & Jerry
Rainbow Bright & Lady Lovely Locks when I was younger and those were big.
Yogi Bear
That's all I can think of for now. I don't remember getting up just to watch them on Saturdays or anything. Mom usually limited how much I could watch at once.
Most ALL the old cartoons! Kids today do not know what they are missing. I remember waking up early Saturday for the 3-4 straight hours of such cartoons. Cartoons of today don't hold a candle to the old ones.
Of course, I forgot to mention Rocky and Bullwinkle, and Roger Rimshot ("That's Ramjet!!!").
What many people don't notice as children is that those Bugs Bunny, Daffy Duck, and such cartoons were produced as "short features," to be played before a movie in the theaters. That's why they had such high production values, and why many of the verbal jokes were way over most kids' heads.