I found somewhere on the Internet that this is a question relating to psychology where we are supposed to either agree or disagree.
When it comes to this particular question, I would disagree. Although having an unpredictable job may be more fun, it is also unreliable - you may lose your job at any time, and eventually, the fun may stop. It is better to have a predictable job where you know what you will have to do every day, and can thus prepare accordingly.