There's a reason Intronan only whispers, and it isn't really because he's an assassin shadowy guy.

To everyone except I suppose humans, common is a second tongue. That factors in on how they speak, to an extent. Every character understands it, but not all are fluent in it. I think that can help add flavor to speech, and to roleplay.

And no, you're not the only arial fans around. I've always been a huge fan of them, and I've rarely seen their roleplay explored as much as other races, for some reason.