Every professional has encountered that client, the one who floods your inbox at odd hours, nitpicks the tiniest details, or rethinks decisions three times before lunch. They leave you mentally exhausted and occasionally googling “Is it legal to fire a client?” And yet, something surprising tends to happen: Those same high-maintenance clients often become the most loyal. They stay longer, refer more people, and advocate for your work far more than the so-called “easy” ones. T

In the fast-paced and ever-evolving business world, success is often attributed to visionary leadership, innovative products or services,...