I love bright, zingy, pictures that sparkle and now with the quality and control of the LCD and EVF on Fujifilm X Series cameras, there is no reason not to reach for these top notes in images that say sunshine.
Why 255 and not 256? There are 256 levels of tone in an 8-bit file but because zero is one of the values that leaves just 255 for all the others. White is made up of 255 Red, 255 Green and 255 Blue. Our eyes can only determine about 100 steps on a greyscale so the 8 bits of JPEG files is fine for all output on print or screen.
If the shot looks good it is good. Avoid histogram hysteria. What does the tech know about art anyway? Nothing.
Camera club judges and even some professional judges have it in for pure white. I’ve no idea why, as white is such a powerful tone. I’d rather see an area of pure white than a black hole in prints. Having said that, graphic images at both extremes are often lovable.
Push the exposure so hard the shot screams at you and then pull it back one click. What can possibly go wrong? Have fun and push the boundaries from time to time.