What is a good trading fee?

When it comes to trading fees in the world of cryptocurrency and finance, what exactly constitutes a 'good' trading fee? Is it simply the lowest possible fee, regardless of the platform or service provided? Or does a good trading fee take into account other factors such as security, reliability, and ease of use? Is there a balance to strike between cost and quality, or is it a case of 'you get what you pay for'? Ultimately, how does one determine what a good trading fee looks like in this ever-evolving landscape?