When I speak to high school students getting ready for the workplace I always give them the same advice; be authentic and watch what you put online. Its like Sinatra said in Love and Marriage, in this day in age you can't have one without the other.
If anyone tells you no one cares what you think they're wrong; employess do. And they will use your persona against you. Most times you won't even know it. The best way to defend yourself is to be authentic and consistant through out your social media accounts. Remember anything that is public effects your image. After all what is an image other than what someone sees. Read and learn.