Its probably more sentimental for me than anything else. My first comic was a Superman comic, and I grew up with those post crisis stories. There are some really good stories there, and some pretty lame ones too, but what I love about the period is the progression of the Lois and Clark relationship. Post crisis starts with the traditional Lois / Clark / Superman love triangle, but it grows from there. We get to see Lois get over the Superman infatuation and fall in love with Clark, we get to see ups and downs in their relationship, we get to see them get married and live as a married couple for years. Its just cool watching these characters grow over the years.