Do you remember learning to ride a bike? Maybe not, but you did it. The more we do something, the better we get at doing it (typically). The better we get at doing something, the more confident we are that we are doing it right.
Now let’s look at Design. It doesn’t matter if you are designing a website, a video game system, or even a chair. If you care enough to be confident about what you are doing, you will reach a point when you will think it is the most amazing it could ever be – or better yet, the most amazing thing in the world! Even if it is your first one. Especially if it is your first one! Have you heard of observer bias? Well this is designer bias.
I don’t want to argue with you. I’m sure your design is awesome – but are you willing to bet your business on it?
That’s quite the gamble. And that’s where good UX research comes into play. Maybe the UX research will tell you that you were right, and you did know everything (doubtful). You get a big ego stroke and walk away validated. Most likely the research will tell you something you didn’t already know, and you can walk away having learned something and avoid a business mistake.
Don’t let over confidence hinder your users’ experiences. Think of it as insurance – against human error and natural bias.