Look and feel
You’ll see the interface a lot…
To withstand the pressure of the next flame war, your interface had better look good. But good looks are subjective. Some people want a lot of colour and a picture-based background, but a more basic issue is whether your text is dark or light. Most of these clients use the dark or light theme, and most have a total of four variants. NeoChat has four colour themes and some other titbits including Bubbles and Compact for the message feed. In Fractal, you can change the theme to match the system’s, other settings seem to be missing.