This reminds me of when I first discovered Minecraft in university. I was just going to play for a couple hours before bed, and I got sucked into the game-loop and before I knew it the sun was coming up. A few days later, I was walking toward the railroad crossing I often had to wait at between my house and campus, and just for a moment looked at those tracks and I seriously thought about where I should place the Min…
As for the "seeing blocks". I had a period where I played some form of match-3 game, and while walking around I couldn't stop imagining arranging people walking into threes.