I think each season was great with Spike because each season allowed us to see a new side of him. I love the BIG BAD but I think I love his transition to the man in the final season the best. So many of us struggle to be better people, to make more of ourselves. Some of us even search most of our lives for redemtion that we never find. I admire that he found that truely human part of him and struggled to become someone stronger. To me it spoke volumes for his character and the acting range of James. And hey, he saved the world!