Just make sure you're not holding the GamePad in your lap while you're chatting. It's not a flattering angle.

You may find that out the hard way while you're playing a game like Nintendo Land—some mini-games project an image of the player who's using the GamePad up in one corner of the screen. No doubt your multiplayer opponents will get a kick out of the quadruple chins that appear when your head is tilted down to stare at the controller in your lap, but you may not.