While it sounds like its hard drive may soon give up the ghost and it can't run for more than an hour without being plugged into power, I still use my iPod Classic around the house on a daily basis. I love it and even though I've moved on to using a Fiio M7 as my daily musical driver, I'll definitely spend the time and money to keep it running.
This video from Pitchfork deftly explains what made the original iPod and its clickwheel descendants such great products, and why using a smartphone to listen to tunes, despite the convenience they afford, doesn't hold a candle to the listening experience a dedicated music player can provide.