A personal site built to feel like an iPod. I'd modded my own iPod and fell in love with the clickwheel, and I wanted that same feeling on the web. It's mobile-first, so on your phone you actually use the clickwheel with your thumb to scroll, which is really fun.
The part I'm proudest of is the click. To get an authentic clickwheel sound, I tracked down an old video of someone using theirs, pulled the audio out, and engineered it into a clean click.
It wasn't the most practical thing, since you're stuck inside an iPod-sized screen. But it was the most fun I've had making a personal site, and it's still one of my favorite projects I've done. It's just a beautiful interface.