In my case the first LEGO set I had was the 2002 LEGO City Police Headquarters - 6636, to be exact, a big one! What was your first LEGO set or sets (if you don't remember exactly)? I'd be curious to know 👀

My first set was LEGO Agents, I really enjoyed that theme! The particular set was 8634: Turbocar Chase https://img.bricklink.com/ItemImage/ON/0/8634-1.png