Before you go shopping for a WordPress theme, you should decide what content your website will have, and which elements are most important and need to stand out. How many pages are you going to have? What widgets will you require? How many columns would you like? Where do you want the navigation? Will you need drop down menus? Do you want a border around the pages?
Some things are easy to change, e.g. font face/sizes, colours, backgrounds, so disregard them when you’re looking.