The Midjourney features most people do not use are the ones that actually matter for serious work
Most people use Midjourney by typing a description, looking at the four results, upscaling the best one and moving on. That workflow produces decent results but it misses most of what makes Midjourney genuinely powerful for anyone trying to do consistent, intentional creative work.
The feature I get the most from is Character References using the --cref parameter. You provide an image of a character and Midjourney maintains that specific person or character across different scenes, poses and settings. For anyone producing a series of images that need visual consistency this is the thing that makes it possible. Without it every generation is a slightly different person regardless of how carefully you write the prompt.
Style References with --sref work the same way but for aesthetics. You provide an image whose visual language you want to match and apply it to entirely different subject matter. That is how you build a consistent visual identity across a series of images without having to describe the style from scratch every time.
Seed numbers are underused and important. Every image has a seed that essentially locks in its compositional structure. You can use that seed to test how small prompt changes affect the result while keeping everything else the same, which is how you do real prompt iteration rather than just hoping the next generation is better.
The Editor for inpainting and outpainting lets you erase and regenerate specific areas of an image or expand the canvas in any direction. When a generation is 90 percent of what you want but one element is wrong that is dramatically faster than regenerating from scratch.