The cartoon series had some pretty unique villians like Stilletto, the Italian crow and Count Duckula, the nerdy vampire with a speech impediment (who got his own spinoff series). Then there's the big boss, Baron Silas Greenback. His raspy voice and evil "toadiness" made him a low key but intimidating bad guy. I always pictured him as the type of character who had a brass knuckle collection and damn proud of it, too. And just like Bond's Blowfeld, he had a white furry pet.
I've collected DM memorabilia throughout the years. To this day, I still use this cigarette case as a wallet. Everyone always comments on it, "Wow, I totally remember Danger Mouse on Nickelodeon."
I even have a sketchbook full of DM drawings by some well known artists. I always take it with me to cons. For them, the nostalgia and originality really make the commission stand out in their mind (they get sick of Batman sketches people!)
AV Club did an excellent article on the beloved cartoon as well as other Cosgrove Hall shows.