Johnny B is looking for a career that will allow him to have prestige. He doesn't want to work hard, and values continued learning. He enjoys Arts and Writing, and is good at being creative.
Tony Montana (Scarface) Entrepreneurs start businesses, any kind of businesses. Though he was a nickel-and-dime drug dealer once, Tony Montana now deals in massive quantities.
Lt. Cmdr. Quinton McHale (McHale's Navy) Military officers hold the lives of soldiers in their strong will and good judgment. McHale is the top and foremost naval officer, a brilliant man full of integrity and an unbounded knowledge of military strategy... oh wait, he's not.
Professor Sherman Klump (The Nutty Professor) Professors have found a way to never get a job: they just stay in school until they are dead. Klump, at least, is one of those professors who does a lot of research and work outside of his job, which amuses his entire family.
Mugatu (Zoolander) The title "fashion designer" really says it all: They design things that people wear. Mugatu is the genius behind the piano key tie.
Bill Lumbergh (Office Space) Businesses need managers: without a boss breathing down your neck you would never do any work at all, you'd just sit there, or stay home and show up on Friday for your paycheck. Lumbergh is the perfect example of how even the most unpleasant of people can get the respect of a whole corporation by simply having a good job.