(I've always done it this way but hardly anyone else seems to)
Cutting peppers vertically into segments makes it easy to then pull each segment off the stalk at the top, without leaving loads of edible bits of pepper behind the way you do if you slice the top off horizontally.
Cutting peppers vertically into segments makes it easy to then pull each segment off the stalk at the top, without leaving loads of edible bits of pepper behind the way you do if you slice the top off horizontally.