Deleted mine way back in 2010.
I'd been on it since high school in 2005 and treated it like the new version of MSN Messenger (oh 2002...). After a while it just got stale and it felt like I was pouring way too much of my personal data on to the platform. I think the turning point came after a friend of mine had committed suicide and his profile continued to live on the platform for at least a year. People kept posting to it and it just didn't sit well with me at all and I didn't like the idea of having an FB profile tombstone for myself either.
So, I nuked it. Haven't missed it for a second.