FWIW, I'm not a big fan of choils. If I have to have one, however, I prefer a rounded choil to a square choil.
My thoughts exactly. I don't like choils on knives under 6 or 7 inches in length, and I really don't like the shallow square choil, which makes it so easy to nick your finger on the back of the edge. A choilless S5 in bama clay coated INFI would be just about the perfect knife ever.