The Scooby Doo Show is in My Opinion next to the original Scooby Doo, Where are You! In quality.
The Mysteries are fairly complex and The Episodes feature very good Writing, so even as a 25 y/o, I still enjoy The Series as much as I did when I was just 5. Many Episodes also feature Relatives of Scooby or The Gang, so there is even some Character Development.
The Animation is lovely like It's Predecessors, featuring those beautiful Hand-Painted Backgrounds which give The Show that classic look You can only get from Old Fashioned Cel Animation like This.
The Acting however is where I think This Series exceeds It's Predecessors, The Victims of The Ghost/Monster Attacks especially sound genuinely terrified, so much that even as an Adult, My hair still stands on end a little.
My One and Only Negative is that many Depictions of Ethnic Groups are very Stereotypical, which is The One and Only Reason I subtract 1 Star from My Rating. I would remove more then 1, but I am lenient given that This Series is now 45+ years old.
My Closing Statement; The Scooby Doo Show deserves a Solid Thumbs Up, just remember that at 46 years old, It can be rather dated in Diversity.