Here is a list of long running trading card games (http://l-lists.com/en/lists/yjs88u.html) (produced for at least 10 years), and I was wondering if it was missing any.
The list currently has MtG, l5r, Vampire: The Eternal Struggle, Pok?mon, Yugioh, Redemption, Star Trek CCG, HKK (a Hungarian TCG), Shadowfist, and Myths and Legends. The list has a description of the gist of each game, and card images.