Utilizing whole disk encryption via FileVault 2 will ensure that if your computer is lost or stolen, your data will not be retrievable. For those with sensitive client data (or business data), utilizing this feature is fundamental to your business security.
For the sake of your clients and your family, please turn on FileVault. Apple has made some serious enhancements to this super-security feature in Lion.
I am an Apple Certified Support Professional with over a decade of experience supporting families, schools, and businesses. Tech has always captured my imagination, but it's not my only passion. I'm an ordained Anglican minister; Aeropress is a daily ritual of mine; I've driven across Mongolia; and I'm the father of three girls. I hope to provide for you a balanced and realistic perspective into the practicality of technology.