Please keep in mind, for such requests, it is very helpful when the one requesting provides a stroke picture if the source software the requested brush preset stems from offers these, so this kind of picture:
Additionally, use the requested brush preset in its original software to make a few sample strokes on canvas presenting its capabilities and make screenshots from these sample strokes in good resolutions that are suitable to reveal the details of these strokes. So, show at least a brush stroke going from slightest to maximum pressure, one circle, a few overlapping strokes with a single as well as with multiple times over-paint on one crossing point to show if it builds up and how this is represented.
In other words, showcase that brush presets abilities as complete as possible, your abilities as an artist are not important for brush requests. Unfortunately users often show complete artworks, not seldom in low resolutions, where you can not be sure was it made only using the brush in question or a whole palette of brushes, but what really helps, so screenshots of ↑ brush strokes in a good resolution ↑ instead of thumbnails of low quality.
This way you support those supposed to help you best.
Michelist