I'm a Linux person - largely because of what it's done for my old laptop (which I'm using now) - it's made it as sleek and fast and lovely as anything I could buy in the shops today. I can't think of a single instance in which I've missed Microsoft Office - OpenOffice on Linux is great. In fact, I've had difficult to open documents on my Windows PC at work, which I've had to use Openoffice (for Windows) to open which wouldn't have been viewable otherwise!
Regards, Ivan