One of the reasons older viewers have tuned out Cartoon Network in recent years might be the cancellation of the anthology series, Toon Heads, which usually aired on Sunday nights. Even though only three seasons worth of episodes were produced, the network kept the show running for 11 years (1992-2003), bringing it back for a 1 shot special in 2005.
Toon Heads was informative as well as entertaining. An off-screen narrator explained the history of certain characters (i.e. Tom & Jerry, Elmer Fudd) and offered trivial facts about creators such as Chuck Jones, Tex Avery, and Bob Clampett, or actors like Daws Butler and Mel Blanc. In fact, CN's subsequent anthology packages devoted to the works of Jones, Avery, & Clampett could be considered spin-offs from Toon Heads as they mined the same ground.
Unfortunately, no complete episodes are available. What is, however, is a network promo and the intro:
It's just too bad CN can't be bothered to bring this show back again.