The Real Ghostbusters (seasons 1-3)

The Real Ghostbusters is an animated television series created by DiC Entertainment, and a spin-off of the comedy movie, Ghostbusters. It ran for seven seasons from September 13, 1986 to October 5, 1991.

Summary
The series follows the continuing adventures of the four Ghostbusters, their secretary Janine, and their mascot Slimer, as they chase and capture rogue spirits around New York City and various other areas of the world.

Why These Seasons Rock

 * 1) They are faithful to the source material.
 * 2) Great voice acting.
 * 3) Awesome animation (at least in the first five seasons).
 * 4) The villains look scary and awesome.
 * 5) Good music choices, especially the opening theme.
 * 6) They are canon to the movie.
 * 7) Funny and memorable characters.
 * 8) Often mocked rival franchises such as The Simpsons, Teenage Mutant Ninja Turtles and He-Man and the Masters of the Universe. Potshots were even taken at Filmation's Ghostbusters, a cartoon running concurrently with The Real Ghostbusters.
 * 9) Interesting story ideas, such as the Ghostbusters confronting Cthulhu from H.P. Lovecraft's mythos.

Bad Qualities

 * 1) From the fourth season onwards, the show's quality began to decline after Slimer was made the main character, and the scary aspects of the cartoon being toned down to be made more kid-friendly.
 * 2) The animation can sometimes be awful (mostly the episodes produced by Sei Young, Plus One and Sae Rom), specially for the final two seasons.

Trivia

 * Lorenzo Music voices Peter Venkman in the first two seasons of this cartoon, and voices Garfield in the 1988-1994 cartoon Garfield and Friends. Bill Murray plays Peter in the Ghostbusters movies from 1984 and 1989, and voices Garfield in the two Garfield movies from 2004 and 2006.
 * Ernie Hudson, who played Winston Zeddemore in the Ghostbusters movies, auditioned to reprise his role for the cartoon, but lost to Arsenio Hall, who voiced Winston in the first three seasons before Buster Jones took over in the role for the final four seasons due to Hall leaving to host his own talk show from 1989 to 1994.
 * The name "The Real Ghostbusters" is due to Filmation using the name "Ghostbusters" as the title of an animated sequel series to their 1975 live-action comedy show The Ghost Busters.
 * Above by the last question, it was premiered the same month with the unrelated Ghostbusters series by Filmation,(September 8th) but was premiered after the first week's ended (September 13th.)