My introduction to Miyazaki was Kiki's Delivery Service and I was very impressed. I quickly went and got everything else of his that I could find. I LOVE Kiki and Totoro, but some of the animation in Spirited Away makes me swoon to this day. I have not had as much success getting in to other anime, but I have to say (although maybe not considered pure enough for this discussion) that I am a big fan of the Avatar TV series. It has some amazing animation and the writing is top of the line.