I really like the functional approach of PowerShell. The pipeline, while not the end-all-be-all of perfection, is still very, very good and very flexible. Once you get into the functional mindset, it is very easy to write terse, powerful code.

My real wish is that there was a syntax for writing function decorators and function generators. This would be similar to the [cmdletbinding()] syntax, but would allow me to write my own.