A preset should be a starting point, not the finish line. Once you apply a file, you can still move the sliders. Consider changing the hair color, adding unique facial scars, or adjusting the height to make the character feel truly yours.
Characters often look different in the "character select" screen than they do in the actual game world. Always test your character in a few different lighting zones before finalizing. Blade And Soul Presets
You cannot apply a Jin preset to a Yun character. The sliders are unique to each race's skeleton. A preset should be a starting point, not the finish line
The community has created massive archives of high-quality looks. Here are the best places to browse: Characters often look different in the "character select"
While known for textures, many creators upload preset packs here.
Installing a preset is simpler than it looks, but the file must be placed in a specific folder for the game to recognize it.