Type (a) explores the brain of a creative who is devoted to the science. Many of these people regularly lose track of time, go into rooms only to forget why they did and are known for a warped sense of humor. But they work their butts off. Because they're hooked on the work.
Type (b) depicts a person who is not so concerned with the rules, eats strange foods, are heavily into social media, generally dresses weirdly, and most aren't allowed offspring. But they work their butts off. Because they're looking to make their mark in the world.
Both can generate exquisite, breakthrough work for totally different reasons. Inspiration and innovation can come from many different directions.
So, if you're thinking of hiring a creative shop to promote your business ask to meet the creative team that will work on your account. If you don't, you'll miss meeting some very nice, talented and interesting people.