An instance is a place where people go to waste they're lives in an endless circlejerk surrounded by retards. If you really enjoy them you probably hate yourself. If you have not started already then don't. It is an endless pit of pain and regret. Your family will hate you, you will never get a girlfriend and you will probably loose your job.
D00d : Get on warcraft, we are raiding the instance BWL and have been wiping for the last 5 hours.