I've always found the first season to be the best. The second season wasn't as good, but it was still interesting. The third season was the worst. There was nothing interesting about it and the entire series seemed to be going down hill. However, the fourth season has renewed my interest and I find it to be quite interesting. It is better than the third season for a definite and at the moment, as good as the second season. But if it continues the way it is, I think it'll be by far the best season in the entire series.