It really depends on your personal preference and what kind of photography you are doing. If you're shooting outdoors a lot, a camera skin can help protect your gear from dirt, dust, scratches and moisture. It is also good for protecting the finish of your camera body if you don't like to use a case or bag all the time. On the other hand, camera skins add bulk to your setup and can limit accessibility to buttons and ports. They also tend to attract fingerprints which can be difficult to remove without damaging the skin itself. Consider how much protection is necessary for your particular situation before making this decision.