My ALL-TIME favorite set that was both challenging, yet tons of fun to put together was the 1997 Upper Deck baseball. The set was in two series and an overall 520 whopping cards not including the update cards which I didn't do.
There were some fun inclusions in both series including this tribute cards to Jackie Robinson to open up the first 9 cards of the set:
Then some great photographs for the base set including this unique one:
The base cards were border free and each were "game dated". The base set also included these subsets within:
So pack upon pack. Box upon box. Card show upon card show and I finally acquired them after many months of the chase.I felt so relieved and couldn't wait to put the entire set into a binder to view.
To this day, this is still my favorite set despite the many I have put together since. This set will always remain in my collection in that same binder til I hand it down someday along with the story behind it. Along with this, I hope to hand down the art of set collecting as I will do my best to help keep it alive.