All coffee beans, except flavored ones, are suitable for use in automatic coffee machines because they damage the mill itself. And then it all just depends on individual taste. Just keep in mind that lighter roasted beans, which are more designed for filter coffee preparation, can be much higher quality when prepared through an automatic espresso machine. However, it would be better to choose medium or dark roasted coffee beans to make the taste more pleasant. Some coffee makers even state on the package that the coffee is roasted specifically for espresso coffee machines or automatic coffee machines.