That pterodactyl thing goes back to (at least) one of the old Sinbad movies. I think my fav Jonny Quest even did that, but I don't remember that episode well enough to be sure.
As for the Scooby Doo...I agree. It's Hanna Barbara. They DID make Jonny Quest, but they had to get something right
. I think it boils down to commercials and toys. They cranked out the cartoons because kids were buying the toys. Most of the classic Warner Bros stuff was for the theaters, when all they were selling was movie tickets and popcorn.
I've been watching the Futurama episodes on Adult Swim lately, and man oh man, they ARE funny!
As for the Scooby Doo...I agree. It's Hanna Barbara. They DID make Jonny Quest, but they had to get something right

I've been watching the Futurama episodes on Adult Swim lately, and man oh man, they ARE funny!