There's so much to say about this show. It's educational at times, full of pop culture parodies and references, full of adult jokes that somehow made it past censors, has tons of likeable characters, and endless jokes, gags, and puns. The cast is so very talented, especially Rob Paulsen who voices a wide number of characters on the show and manages to make each one sound unique. It's too bad this show had to be cancelled when the last episode made it seem like they were going to make more.
I would highly recommend watching the animaniacs movie as well (after watching some of the show to understand all the character cameos of course), and I am truly looking forward to watching Hulu's reboot series with the original cast.