In Meyers-Briggs typology, as it pertains to information there are two types, “Sensing(S)” and “Intuitive(I)”. Neither is right or wrong they are just how we prefer to digest information.
Sensing personalities prefer the up-front and obvious as where Intuitives get more from reading between the lines and problem solving. Something to consider when developing your UI for the users who will be interacting with it. Will it be a new, innovative navigation or will it be a step-by-step process with big orange buttons and plenty of instruction. Singling out which type is most likely to be your audience is a great first step to establishing how your UI will flow.
Creating personas will help you decide which type will be more likely to use your interface, and thus how basic, or feature-rich your UI can or should be.
Personas aid in developing your UX by creating fictional users and establishing what behaviors they have and what they want to get out of using your UI. The tricky part is ensuring these personas are realistic and not just created to ultimately align with your goals. You might even try using someone you know and trust to give you their honest input. Preferably this person would be in your target audience. You wouldn’t want to get into the mind of your grandmother if your selling skateboards! (no offense grandma, you can still shred a mean half-pipe).
In short, creating personas will help you plan your UI and UX strategy by helping you decide who will be using your user interface. Stick to your personas and don’t change them to align with your goals. Make the changes to the UI to align with what the user wants to do. You can change the UI, but you can not change the user.