While I've never had any use for formats in perl 5, I must admit that the exegesis about them in perl 6 is quite interesting.
My favorite part is the section on what happens when form is called in void context:
When called in a void context, form waxes lyrical about human frailty, betrayal of trust, and the pointlessness of calling out when nobody's there to heed the reply, before dying in a highly theatrical manner.
