My folks gave me a big box of hard drives from various family computers over the years. Learning to use ddrescue and photorec to get data off of them was a ton of fun. Really cool tools, and not wildly unfriendly to someone who’d never used them before. I even managed to recover the drive that crashed a few days before the start of my junior year of high school, leaving me to re-write all of my summer homework in a panic. A little late on that one.