As my home office is in an open-plan area of the house I need my files, folders, etc to look good, which is why I like these Ecoboard ring binders from Officeworks. Nice price, too, as the big lever-arch folders are just $4.99.
What I don't like are the labels on the spine, which can't be removed. However, they can, of course, be painted over. Much nicer.
Small Things Simple Pleasures