I thought so too. I enjoyed everything about it. The action, the anmation, the story. But the part I really found interesting were the characters. They were very deep and interesting charcters. Very 3D in terms of personality and character. I especially liked Mugen.
Plus I always enjoy realistic action. As much as I loved the Dragonball trilogy and YuYu Hakasho I really love action shows where the characters are human and realistic and their abilities are possible (I mean their skills are still unbelievably good but there not totally out of the range of human possiblity, they don't fly or shoot energy beams, they punch, kick and use weapons). This and Rurouni Kenshin are two of my favorite shows of all time.