Serif was my personal preference in matching Roman with some Persian
typefaces. But not all X Series 2 fonts have serif Roman. My
adventure has come to an end and I don't make fonts anymore. I think
I exhausted all possibilities that the current font and text
rendering technology provides (in a practical manner) and short of
few variants such as the shape of zero or re-inventing italic face
(which does not exist in Persian writing) there is not much that the
current technology offers except perpetually repeating ourselves.
The fact of the matter is that there is no such a thing as Persian or
Arabic 'typography'. Publishing industry with its technological
limitations stripped off the Persian writing from all its natural
behavior. And now it's time to reclaim a font and text technology
that gives us back the ability to draw characters the same way we
draw them on the paper. Once this technology is established, then we
can start talking about the birth of Persian typography and its
endless possibilities.
Behnam