Furn_Darkside said:
There is a mage-hunter monk PrC in Mongoose's Quint Monk that looks pretty cool.
FD
Here was the place where I was going to put the PrC's name.
But, for the life of me, I can't remember what it is
See, me mums got the copy I bought at GenCon, and I've misplaced the disk with my initial manuscript. Plus, I haven't received my comp. copy yet, and I'm too cheap to run out and buy it.

(too bad there's no icon for sheepish grin).
As to the question at hand:
Of the ones I've written, I'm partial to the Warrior of the Animal Way (sometime soon in Dragon). I also think the Mourner packs 10 pounds of flavor in a 5 pound bag (also in Dragon).
Outside of that:
I'm a HUGE fan of the Iaijutsu Master (OA). My favorite PrC by far. A great combo of ability and flavor.
I also love the Kitsu Investigator from AEG's Way of the Ninja, and the Jade Magistrate from AEG's Magic of Rokugan.
From Swashbuckling Adventures, I really have a soft spot for the Drexel Swordsman.
The Elemental Savant (T&B) also tickles my fancy, as does the Astrologer from Relics & Rituals II [Cue Nightfall

].
Patrick Y.