[King Slazo]

Would have been Pokémon for me, closely followed by Digimon, YuGiOh, Beyblade and Cardcaptors. Loved the lot of them, and I keep meaning to rewatch Digimon and Cardcaptors.

Didn't watch anything after those five for years, until I saw Death Note subbed a year or two ago, which pulled me back into anime.