"A card from the first set you tried to complete."
I might have had a 'bunch' of cards for a number of sets from the day, but there were too many cards - to really focus on one particular set in a given year.
Over the past 20 years, I may have tried collecting an entire set or two, but the enthusiasm wanes off fast - with eBay, there are always big case breakers doing the work so a collector can go out and get a base set of cards without poring so much money into securing cards.
Buying a hand collated set online may defeat the purpose of building sets - but why even bother in the first place, when it's not like a set I may want to try to collect is particularly unique of hard to find.
I think I might have tried to complete the 1999 Upper Deck HoloGrFx set with the Alex Rodriguez card [#54] pictured - I vaguely remember saying in a trade e-mail [probably in 2000] that it was going to be my first set of cards I'm putting together.
I might have bought packs and a blaster when the product and I liked how the cards have a reflective finish to them - it's only a 60-card set, but I think I was still short 10-15 cards before the I basically abandoned the set-building project.
It might be interesting to see if I can knock out missing cards - though a check on eBay shows that I can get the set of cards for $10 and s/h, so I'll just let things be.