Team set collecting was real simply until the decade of the 90s came along. Before 1989 there was only 1 set per year (2 in 1961 counting fleer and topps). In 1989 there were 3 sets to collect (topps, pro set, score). In 1990 that number grew by a few and before the decade was over there were several dozen at any one time. There are litterly hundreds of different brands and sets to collect from the 1990s. Its almost impossible to collect them all, but if you like me, you sure want to have them all!