Adults who ride on the pavement.
Cyclists who buy all the kit but get off on the first hill (Mostly seen on the undulations in South London on the L2B).
Cylists who get an all black bike, wear all black (or other dull colours) and then moan when cars don't see them.
Any cyclist that overtakes me.
Any cyclist that is going so slow that I can overtake them.
Any cyclist that looks down on a triple.