I rarely use any lens except the 150. Aside from the fact that it is so sharp that I need to put a piece of plastic in front of it. People just don't want that much realism. Congrats, you'll love it.
As for the skin thing:
Use tongs and leave the skin on your hands instead of your prints. When people say they like really nice skin tone on their pictures, I don't think they mean that they want YOUR skin on it. Just a thought.