People like Material Design?

I’m creating my first design for Themeforest (I have experience on Codecanyon) and dont know what to do … How successful will be Material styled design ? As i see people like old style designs for example i dont like top seller design at all they are in previous centure, material style, or flat designs have less success (or I am not right?) … Or style and quality is not important and pages number and functionality for first? Please advice somenthing