What was your first videogame that made you say "Ok, I need to play this game properly: I need to upgrade my specs"?
Going back to your beginnings in PC gaming: the first game you played and loved, but the frame rate and resolution weren't ideal. Your first "I need/want to upgrade my specs" basically.
World of Warcraft. I was on Windows XP with 512mb of RAM and who knows what graphics card but I was lagging so bad when WotLK came out.
With all the people standing at the entrance to Naxx I had to basically aim myself for the portal and lag my way in without being able to see where my character was walking due to the lag.
My parents needed a new family PC right before it first launched, and I convinced them to get a slightly better version just so I could spend the next decade of my life raiding with the homies