Robotech was a Japanese animated series in the 80's. It was rather unusual in two regards: it was episodic, with each new show continuing the last, and it was somewhat apocalyptic, with most of the human race being destroyed.
The show was interesting, but people still debate its coolness. I liked it for the multitude of mecha (a term for robotic, walking/flying armored vehicles) that provided solid designs for other great robot universes (like Transformers and Battletech.)
Here are some pretty spiffy Robotech mecha pictures I have found around the 'net.