Funny that it should come up, but I had a Chaplin character once. He was primarily a Flight Control officer who was quite religious, as the Captain noted when, as the ship entered a combat situation, she heard my character quitely muttering a prayer under his breath.
To accomodate the various religions found in the Federation, I made certain that the character (after accepting an unofficial posting as the ship's spiritual officer and religious counselor) had a high general Theology rating (using LUG rules), with a variety of specializations in prominent religions of the Federation (Vulcan Mysticism, the Bajoran Prophets and Christianity, just to name a few).
In-game, there was a lot of play-ability for this character, as he was useful whenever the ship encountered species whose government was Theocratic, as well as serving in the roles that I previously mentioned.
Also, he was granted permission by Starfleet to perform wedding ceremonies, and he also led important dedications and commemorations. Finally, given his spiritual side, he served as the ship's Morale officer.
So, like I said, at least in our game it was a position with a lot of potential.
Greg
<a href="http://dicepool.com/catalog/quiz.php">
<img src="http://dicepool.com/catalog/images/splats/friendly.jpg" height="200px" width="400px" alt="I am a d20"/></a>
<p><a href="http://dicepool.com/catalog/quiz.php">Take the quiz at dicepool.com</a></p>