The standard worktop edge is the straight edge.
It is a squared edge, with only a slight bevel, called a chamfer; this is to take the sharpness from the edge.
A well-liked alteration to this is the quarter round, where the top edge is rounded off, or the double quarter round, where both the top and bottom edges are rounded.
Bull nose is a variant where the top edge is rounded more radically, and a full bull nose makes the edge of the worktop to a perfect half-circle.
Bevelled edges are also admired, and the bevel can be carved on either the top or bottom edges…or both.
Fancier Edges are slightly more expensive.
Possibly the most well liked is the ogee. Inspired by medieval European architecture, the ogee edge is made up of two elegant, sweeping arches, one concave, and the other convex.
It adds a very stylish look to countertops.
Other well-liked edges include DuPont a straight edge dropping down to a curve;
cove - a concave bevel on the top edge;
stair tread - a curved undercut lip;
and waterfall - three flowing convex arches.