Anime with more than 2 or 3 complete seasons that incorporate card games, popular toy lines, or just plain fun to watch.
From both in local TV and cable TV:
A Little Princess Sara
A Little Snow Fairy Sugar
Ah! My Goddess
Ai to Yuuki no Pig Girl Tonde Buurin (Super Pig)
Akazukin Chacha (Red Riding Hood Chacha)
My Completed Anime
Shounen anime involving boys, girls, and their own little monsters/robots.