I’ve seen a bunch of WHMCS setups over the years. Most people stick with the default or some flashy theme they bought once and never updated. If you want something clean and functional, look for themes that actually integrate well with your front-end - nothing worse than a mismatch between your site and the client area. I’ve used a few that kept the layout simple, fast loading, and mobile-friendly. Avoid the ones packed with animations or bloated scripts. They slow everything down and break after updates. Stick to lightweight, regularly updated options. And always back up before swapping templates - I’ve seen more than one client break their checkout after a bad switch.