First “Splatbook” you begged you DM to approve
I didn't play 2nd edition, so I missed all of those splatbooks. I didn't play 3rd edition either. I am running a Pathfinder game right now, and I am allowing anything from Paizo’s SRD. This led to a Tengu Archaeologist joining the party. That’s cool with me, because I like gonzo fantasy campaigns.