Sunglasses at the table

[Lazymeatball]

Everyone knows that a great way to hide your tells, or hide the fact that you're looking out for tells is to wear sunglasses, even indoors and at night.

I play mostly low-limit when in a casino and I wonder if the act of wearing sunglasses changes my image from a casual player to a tight professional serious player.

In certain fun casual (ie profitable) games, does putting on a pair of sunglasses kill the mood?