Continuous glucose monitoring (CGM) systems have revolutionized diabetes management by providing real-time glycemic data, improving control, and reducing the risk of both acute and chronic complications. With an increasing range of CGM systems available on the market, selecting the most appropriate system has become a challenge for both patients and healthcare professionals. This narrative review aims to analyze the available CGM systems and identify the factors that influence the personalized selection of a CGM system for patients with diabetes, based on system functions and features. Factors influencing CGM choice are discussed, including patient age, fear of puncture, physical activity, aesthetics, and financial considerations.