Thought I might just also join the party of 2.0 curves. This is based on an attempt to come as close as possible to a perfect circle, trying to beat Gene in the competition
for the most accurate circle before he pumps out another of his miracles...;) The "o" of this font is in that respect my entry to the competition. Just made it into a whole lowercase set for fun...
I suggest everyone who has his own circle for the competition somewhere in a font, tags it with "circle competition". Absolute accuracy shouldn't be the only criteria; if you manage to get an accurate circle on a small grid size, it should be rewarded as well. Mine has a 20 pixel stroke width and a 116 diameter, so I'm sure smaller solutions are also possible.
Due to its pretty large grid size this is getting dangerously close to the limits of the preview widget, so be patient when previewing it.
By the way: djnippa's swiss army knife of composite bricks
came in very handy here. Thanks!