The one thing a good marketer should have is – a good eye.
A good eye for what looks good. Good marketers know good design when they see it. They appreciate a well designed page, product, thing. They know what to look for and they know how to brief others to create ‘good’.
A good eye for detail. The devil is in the detail, which means he – or she – is in the data, the words, the images, the emotions.
A good idea for what reads well and sounds good – for which you probably need a good ear too. Remember that what reads well and what sounds good are not the same thing. You’ll find few good marketers who are not good communicators, not good at writing, not good at speaking, not good at listening.
You can learn to get a good eye, you don’t have to be born with it. But you must have this one thing to be good.