The very first one I saw was Digimon when I was about 6 years old, but I didn't know it was anime since I was just a kid XD There were others like Bakugan, Saint Seiya, and Yu-Gi-Oh! (my older brother and I were addicted to that one; we even used to collect the cards and won rare cards when we went to see the movie in the cinema. My brother still collects the cards, but I stopped playing Yu-Gi-Oh! because he kept making up rules, just like he does in Uno, lol) Now, the first one I really recognized as anime was Naruto when I was about 12. It always aired in the afternoon on a popular children's TV program where I live. I remember always being super excited to watch the next episodes, haha. They only showed up to the part with the battle between the Third Hokage and Orochimaru; after his death and the funeral episode, it would start all over again. I think that's because not all the episodes were dubbed back then XD