Monitor aspect ratio

Hello everyone, I recently wanted to replace a monitor for my computer. I pay great attention to the comfort of the screen. I would like to ask what is the most comfortable aspect ratio of the monitor?

Thanks in advance

Update: I eventually chose the 16:9 format. I got the answer from this article: https://sguru.org/monitor-aspect-ratio-to-choose-your-monitor/, this type of format is perfect for all types of activities, from working in the office (since it allows you to have two documents open at the same time), to working with design programs or gaming.