One way of thinking is direct drive right blade saws are best for for righties,
left blade saws for lefties. Idea is, if you hold a piece with your left hand,
the larger portion of the base is contacting the wood (for righties).
But then, the more robust worm drive saws preferred by framers tend to be left
blade, although they are better balanced and the sole plates are different. Go
figure.

The old Porter-Cable I inherited has the blade on the right side, and this
is what I'm used to.

Why change a good thing? A new P-C will probably feel just right to you. HTH

Joe