Fame
Here's a riddle: What do chauffeurs carry with them every day but never get to have? Give up? The answer is fame. Your service will involve people known all over the world, riding in a car with a complete stranger up front. Some will talk to you, but many will act like you barely exist. A limo is kind of like a mullet: Business in the front, party in the back, and you're stuck in front-mullet for the entire day.
That doesn't mean a little bit of the fame-sauce won't rub off on you. Chances are pretty good that, whether it's a superstar pop diva, a movie star, or the seventh runner up on The Voice, at some point in your career your job will include having some kind of celebrity in your vehicle. If you live in a major city, it could be a daily occurrence.
And who follows celebs? Human leeches (or as they're sometimes known, "paparazzi"). Don't be surprised if you have Lady Gaga in your vehicle on Wednesday, and see the back of your head as you opened her door, on TMZ on Thursday. Don't forget to forward the link to your parents—that's exactly the kind of thing mom wants to share with her book club.