When considering a theme, make sure to find answers to the following questions:
Are the sidebars flexible? Can I choose how many sidebars I want to display?
Is it widget-ready?
Does it support custom menus?
Is it complex or simple? Which do I prefer?
How flexible is the content and layout? Can I choose the column count and widths?
Does it support the Customizer feature? Or does it offer a Theme Settings page where I can customize layout, category display, home page, and other options