Favorites:
Digimon, this was my very favorite Anime EVER untill I found One Piece.
Duel Masters, the Anime sucks hard because it's boring as Hell due to being a Yu-Gi-Oh ripoff which wasn't so great anyway. But they put so many helarious cultural jokes in the dub that I love it despite.
Flint the Time Detective, Flint (and Sara) are cute. THAT IS ALL.
Early Pokemon, honestly, from what I remember of the 1st 2 seasons, this was awsome. Especially Charazard vs. Magmar. Pure genious with action. The rest was either well done comedy or a masterpiece of Disney classic children's drama.
Least favorites:
One Piece, naturally.
Sonic X, I really like sone parts of it but the rest just seems so dumb. And the coloring is horrible and ugly.
Current Pokemon, oh God this has gone to the firey pits of Hell since Orange Islands. It's unbareably boring and repetitive that I can't bare watching more than half an episode. Usually less.