if you like your face without makeup, and you like pictures of yourself without makeup, then there is absolutely no reason to make yourself uncomfortable on your wedding day. (if you *don't* like pictures without, then you've got to balance which is more important to you - but from the sounds of it, i'm guessing you're fine without.)
the arguments i've heard in favor of makeup are usually that you'll look more "put together" or that "the pictures won't come out"... but that never seems to be a problem for *men* in any of these pictures. so i discount them entirely. if you're happy, you're happy, and more power to you.