I have been working with PD for a couple weeks now, so I guess this is my way of saying 'hi' to the community.
I've managed to make heaps of FM stuff, and I'm getting into learning all the wavetable type objects and how they work. I've probably have gone through half of the tutorials. It seems to be working well with me, as I have been programming my own synth patches for years including some modular synthesizers. As an audio engineer/enthusiast with a six year time (semi-long for being 21) composing in many DAWs and trackers I also have had concrete knowledge of the physics of digital audio prior to starting.
It's great fun, more stable than Reaktor which I think is yuck to begin with, and I'm mostly learning for the lack of good live granular synthesis on the mac.
Josh