This shows how old I am:
Loonie Tunes (especially the ones where Friz Freleng was credited by his real name, Isadore Freleng)
Tom and Jerry (but only those directed by Hanna-Barbera when they were under contract to MGM and Chuck Jones. The Gene Deitch series of Tom and Jerry are probably the worst of the lot, IMNSHO.)
Yogi Bear
Huckleberry Hound
Popeye (those done by the Fleischer Brothers)
Betty Boop
Anything by Fred "Tex" Avery
The Flintstones (the original series from the '60's, especially with Mel Blanc voicing Barney Rubble.
Johnny Quest (the original series from the '60. The later reincarnations did nothing for me.)
Superman (again by the Fleischer Brothers)
And, of Course, anything by Disney, up until the time Walt Disney died.