Because it's where my eyes naturally/most restfully fall? I don't sit to, or facing, the left of my monitor.
Fair enough, author and you and others obviously like it - but follow that line of thought and why do we have sidebars? Why aren't they middle bars? Put the actual content to the side.
A lot of research has shown that in general humans (at least in English speaking countries) look at top left side of page and scan left to right, top to bottom.
People do not look first in the middle of the page .
Fair enough, author and you and others obviously like it - but follow that line of thought and why do we have sidebars? Why aren't they middle bars? Put the actual content to the side.