Hi my name is Hungry, I would have to say Kaichou wa maid-sama was the anime that truely converted me to anime.. I had seen some anime beforehand but none got my into anime as much as that one did. It was just the emotional attachment that I felt for Misaki and Usui and the feeling of wanting them to be together so badly that got me hooked on anime!
Hmmm..... I think "Please teacher" was the start for me.