1985 Topps #703
I have at least 6,000 cards from the 1980s so this was a daunting task. I decided to narrow it down to 1985, since that's the first year I started collecting. I further narrowed it down to 1985 Topps cards (in those days I only bought Topps) that I didn't have any acquisition data on. Which narrowed it down quite a bit. I'm going to arbitrary declare that this is the first baseball card I ever acquired. And therefore, one of my favorites. Plus it's George Brett.