Even taking into account the myriad quills, pens and nibs available on the market, the sweet spot for calligraphy paper comes down to sizing and surface texture. You'll want a paper with enough surface sizing to prevent the ink from spreading and feathering yet has sufficient absorbency to prevent smearing when overlapping lines.
As for surface, typically a smoother, Hot Press surface is preferred as it will allow the pen or brush to move easily and undisturbed leaving a crisp line. A rougher paper will cause some dragging on the nib creating a more ragged edge and broken lines.
