there are things you do need to think about though.
first is your sound, sometimes holding the pick differently during a strum can give you different sounds.
next is feeling, this goes both for sound and how it feels to you. if your concentrating or just holding the pick a certin way your playing will be almost robotic and lack the feeling every player gives their own sound.(the stutter in a strum if you will)
last, if the pick keeps flying out of your hand your 'digging too deep'. no matter how you hold a pick if you cant keep it in your not really using a pick. take it slow and practice hitting the string with as little of the pick as you can.
other than those things you should be ok. if you ever look at how different people hold a pencil or pen when they're writing youll see how different people hold a pick.
have fun
They say the END is near, but I'm Tired of waiting.