System fonts.... Looks fine in most cases and loads instantly. Agree that typography is important.But every browser and every system has slight variations in how fonts are rendered. You can do some correction with font-smoothing or text-rendering properties in css, but even then, things will still look slightly different between systems.Not suggesting that consistent font rendering should be ignored and just left alone as a lost cause, but also don't stress too much about getting it juuuust right everywhere.