The Jetsons was, basically, The Flintstones in space. Of course, The Flintstones was just The Honeymooners in the Stone Age.
What the Jetsons did it did well. It was a family sitcom set in the distant future. The character designs were crisp and clean.
My favorite character were the hapless George and the plucky Elroy. Although I was also a fan of the non-human characters Rosie the Robot and the dog Astro.
One thing The Jetsons did have was a strong bad guy to play off -- George Jetson's boss, Mr. Spacely. Mr. Spacely was a diminutive bully and a great foil for George to fight with.
Like almost all great cartoons, The Jetsons had a catchy theme tune that has survived the decades. Good characters, fun stories, and a great theme song. The result is a cartoon that's lasted over 40 years