As a general rule I prefer square points, but it really depends on the overall look of the razor. The round point on my Boker 6/8 Piccadilly looks so nice...
French, the more wicked the better. I had a semi-custom Harner blade from a SRP buy ages ago that had a wicked "bird-wing" point. It was nearly half an inch of curve with an incredible point on the end. Absolutely beautiful.
I managed to do a quick google and find this old picture. Pity the blade was so ungodly long.