I use CEXs Binance the most. The key factors that influence my choice are security, ease of use, trading fees, and available cryptocurrencies. Binance is known for its low fees and wide range of coins and high security. Ultimately, the best CEX depends on individual needs, such as whether someone prioritizes security, liquidity, or user experience. Personally, I think a combination of security, transparency, and low fees makes a CEX stand out.