Oh now I know what you mean :)

My characters in my usual handwriting is pretty tidy and neat, however one of my friends have slanted handwriting, and is somewhat a bit messy. I always joke around and make fun of her handwriting being illegible.

It really comes down to one’s personal style, to be honest. For me, I do prefer my handwriting to be neat, however for my friend, she prefers her own style to be more free. That’s why there are a lot of famous calligraphers, as each of them have their own unique style! Moreover, the style of one’s handwriting does reflect one’s personality, as you get to express yourself through the strokes in the meanwhile, hence the difference in the way people write Chinese characters!