No. I use Pages (part of Apple's iWork) for almost everything. If I need Word comparability, I open LibreOffice.
Given how seamless the iWork experience is becoming between iDevices (which will be including Macs), how much cheaper iWork is, and how much better the iWork user experience is (they don't have 20 years of feature-cruft littering the interface), there is absolutely no reason for a home Mac user to use Office and few reasons (usually an iron-fisted corporate IT group) for a corporate Mac user to use it.