Season one will always be a favorite. Especially the episode where Tai was retuning to the digital world and kari was all sad and whatnot. It was very touching. Though season 3, Tamers, is my all time favorite. I thought they took one hell of a daring leap when trying to make it 'real', I loved it. It was so much darker than the other two. And the fact that the children could merge with their digimon blew me away! I loved every minute of it! I though season 4, Frontier, was garbage. I felt they were just trying to recreated what they did with Adventure, and they did a badjob. I really disliked it.