Poverty Knocks.
Benbow.
Anything rude about the French.
Almost anything Martin Carthy ever recorded.
Byker Hill.
Colonel Bogie.
Any Child's Ballad.
Over the Hills and Far away.
Sweep.
The Gay Fusilier.
The Princess Alice.
Rigs of the Times.
The Nutting Girl.
Anything from the Copper Family.
A fox-hunting song - preferably not John Peel.
A song about transportation to the Antipodes (Watersons do a number of them)

I'm sure I could go on, but my insomniac episode may be waning...