http://theconcourse.deadspin.com/scooby-doo-theme-songs-ranked-1744622485

From Shaggy & Scooby-Doo Get a Clue! to A Pup Named Scooby-Doo.

My favorites are The original, Scooby Doo Mystery Inc. and What's New Scooby doo.

I like the Original, Scooby Doo and Scrappy Doo, and What's New Scooby Doo.

I like the Original, Scooby Doo and Scrappy Doo, and What's New Scooby Doo.
You've got to be kidding me. Scrappy Doo?!! I hated that little mutt. He was the most annoying, worst character ever created.

I'm not with the majority that find him annoying. He could take care of the bad guys, but they kept taking him away. If anyone was annoying, it was Scooby and Shaggy. I mean I love them, but they kept running away. If it involved food, then they were ok. But this is a cartoon. Character growth, even in todays cartoons, don't really happen. That doesn't mean it doesn't happen.

I pretty much love all of the Scooby-Doo theme songs and shows. (Though I will say the most annoying ones have to be "Shaggy and Scooby-Doo Get a Clue!" and "Be Cool, Scooby-Doo". With the former, I don't much like the theme song or the show. With the latter, the theme song is fine, but I don't much like the show itself.)
But to clarify- even if those are low on my personal rankings (along with "The 13 Ghosts of Scooby-Doo"- for different reasons), I still enjoy watching all of them, since I like Scooby-Doo in general. "A Pup Named Scooby-Doo" is one of my favorites for sure- and "Scooby-Doo and Scrappy-Doo". (I'm also one of the few who like Scrappy just fine. I don't have a problem with him.)
And you can't beat the original classic- "Scooby-Doo, Where Are You!"