I'm working on about 15 different auto insert sets, from 1998 to current, across the 4 major sports. I basically just look for a set I think looks cool (players in the set don't matter) and start collecting. My progress ranges from about 25% done with the largest set I'm collecting, the 2005-06 BAP Autos (173 cards), all the way down to 0% done with the 2004-05 SP Legendary Fabric autos BKB (11 cards).