Fame
Ha ha ha ha...that's a good one. We're going to say something that will hurt, so we'll do it quickly (like a band-aid): No one is paying attention to the person handing them their double mochaccino macchiato no foam soy extra shot latte. They are hoping to get on with their lives and out of your eccentric coffee shop's atmosphere. They expect their coffee to be good, so they won't be surprised when you do an incredible job. We can't all be tweeted about by Katy Perry, okay?
If you are a barista and you become famous, it will definitely be for something that is not barista-ing. The closest thing might be your famous blog about being a barista.