It depends highly on the application. If the application domain is inherently complex and or used in business contexts, then they will have to learn how to use it regardless. Intuitiveness only works for somewhat cookie-cutter applications. Consider Excel: Excel is not intuitive to people who have not used excel. We can make it easier to use, but regardless the user will have to learn the fundamentals of a spreadsheet (and even how the data is stored in memory!) in order to successfully use excel. The reason I say users even have to understand how data is stored in memory is because of types. Dates are not strings, for example.