My main focus of collecting is T205's, T206's, T212's, and all Topps Yankees cards 1951 to 1979 in PSA 8 and 1980 to 2012 Yankees in PSA 10. There are 2306 Yankee cards on my list, I own close to half of them so far. I made a list from the PSA registry lists and then added many cards they forgot. For the T cards, I only use a basic list so I don't purchase any duplicates. I was thinking about starting a true type set as in one card from each set but the T's and Yankees keep me busy since i'm a front/back collector, theres maybe 10 to 12 thousand different cards between the four sets I collect. I get my Type set fix everytime Leon posts something i've never seen before.