I've always preferred smooth grips, since I favor using some kind of pattern on the frontstrap and MSH (checkering, stippling, skateboard tape...etc) to give you a good grip on the pistol. The smooth grip will be easier on your hand and allow for easier adjustments on your grip of the gun.
Of course this is a very subjective matter. See if you can try both and see which one you like.
Do some shopping. This is one area where personal preference should definitely take a front seat. This is an item anyone can change, and selections should be based on what feels good to you, how they feel when shooting, and best of all "do you like how your gun looks?". This is a fun area, and should reflect your preference and taste.