I enjoy watching the original cartoon when it's on. I enjoy it for '60/'70s theme song, the same catch phrases in every episode, such as "This whole mystery is beginning to make sense!" and "And I would have gotten away with it too, if it weren't for you meddling kids!"
My favorite character is definitely Shaggy, he's so funny and I love how devoted he his to his dog. I also liked how Velma proved you can be a girl and still be intelligent and useful! I mean Daphne was nice, but she did nothing on the show! She stood there with her hand on her hip, got kidnapped and occasionally bumped into clues (accidently).
Scrappy Doo was your typical "jumped the shark" moment, along with their other attempts at remaking themselves. I liked their first movie, it was cute. And I'm glad they've tried making a new series. It's just that nothing can beat the silliness and campiness of the original!