I did, maybe 7 years ago, for a few months. Unfortunately, the room I had it in got really hot and my wife didn't like the noise it made, so I sold it. IIRC, I mined like 1.5 BTC before giving up.

The reason I don't anymore is because it's too much maintenance. It's one of those investments that's also buying yourself a job. Not a big fan of buying myself new jobs.