Here are a few sample websites I have done using WordPress.. WordPress is simple enough a client can change things, yet powerful enough that I can create something much more detailed or functional.
This site shows an example of a purchased theme.. the Hairsrpay theme was $45, and tailored towards a hair salon providing functions like date pickers for appointment forms and a team section making it easy to add/delete team members.
This site features a WooCommerce store, as well as an integrated testing system showing the complexity of what can be done in WordPress.
This site shows an example of what taking some time and looking around a bit can do for you. This full featured theme is bright, beautiful and has some cute features, but took a while to find, having to look through the almost 100,000 free themes available for WordPress.