It's unfortunate that his demeanor is so easy to parody, because most people only remember him for his weird and goofy cadence and not for anything he actually said.
Well, to put a positive spin on it, some people not normally into researching the universe remember some of the information he spoke about because of his goofy voice. Even if they are just repeating it as parody.
Horoscopes contradictory? Astrological predictions not accurate? I am shocked!
Sagan seems to miss the real point of astrology in today's culture--it provides fodder for emotionally stimulating fluff talk with some chick about your signs or the horoscope in the morning paper, and it's a great idiot detector when you run across someone taking it seriously.
I prefer a world where eccentrics and misfits live, so I must defend astrology's existence by pointing out how much less interesting the world would be without it.