Toughest "regular" issued set from the 1970s??

[tjv815]

I got back into collecting around 2000. and started with my birthyear set of 1972. Shortly thereafter, I added 69-79. I had a blast working on those sets. About five years ago, I decided that I would work on the OPC sets, figuring I would have another great time putting these sets together, and giving me another opportunity to pick up some classic vintage cards. Nobody told me how difficult it was going to be to work on these sets. I am having a blast, but it has been a slow process. And I will agree with some earlier posts about the 1974 OPC set. Without a doubt, a difficult set to build. I love those Aaron specials from 74. Very cool. And I have always enjoyed seeing the differences between the Topps issue and the OPC issue. The backs of the 1971 and 74 sets really stand out. Overall, from 65-80, I am having a good time working on these sets.