That one year: everything was good

[ERON]

I have to go with 1998. Morrison on JLA, Waid on Flash and Impulse, Marz on Green Lantern, Jurgens and Kesel on the Super books, Moench and Dixon on the Bat books, Dixon on Green Arrow, Robinson on Starman, David on Aquaman and Supergirl. DC was firing on all cylinders.

[TheRay]

My pick would be 1990. They were releasing Bugs Bunny comics.
Just a fun year.

[Mike]

1983:
The New Teen Titans were just coming off their Brother Blood and Blackfire arcs, and headed toward The Judas Contract
Batman and the Outsiders had just released.
The Justice League of America was in the the last, glorious days of The Satellite Era
Batman and Detective were aimed at creating good, street level comics
All-Star Squadron was just beginning to hit full speed.

I would say 1983 also.
Add in The Legion of Super-Heroes and the Fury of Firestorm.