When I see the results that many game developers produce, it shows me a sign of a) what is happening in their mind/thoughts, and b) whether they have the ability to discern whether something is good or not. So it seems like to be successful in design/style, you have to have a sense of taste/style, you have to be able to know what is attractive and what isn't. It's kind of like if you want to sing but you're tone deaf, you're not going to produce nice sounds. So you need some kind of `talent` for being able to tell whether something works or not, whether it's a good idea or not, whether the style is right or not, whether it is easy to use or not.. you need to be able to make decisions about quality. So this seems to be an essential ingredient in being successful at making 'good games' - you gotta have some taste.