[threeqhan]

They're great for implementing complex language semantics like cooperative multitasking (using macros to expand yield/resume points into a state machine for stackless coroutines, for example). Or cool object systems like type classes and multi methods.

Smaller stuff like hand rolled parsers and serializers are much easier to get working fast (both time to write and time to run) using macros. Since a good chunk of my work is data flow in one form or another, I miss LISP macros a lot.