I've been writing unix shell and perl scripts for years as well as some Facespan and applescript but my preferred modus operandi is perl. I think I dream in perl at night. Being able to combine in a matter of minutes a GUI with perl scripts instead of to having "roll your own" user interface through Facespan or some other such GUI builder tool is like manna from heaven.

I can concentrate on the guts of the code instead of making windows behave...I love it.