This is just a theory (same with a lot of things) but comedians seem to have messier handwriting; people who seem to take things more seriously have neater handwriting At least that's how it is at my school
It all just really depends what they are like. Some can write big and sloppy and some can write neat and tidy. An Aspergers person can write neater or sloppier than anyone else. It doesn't change them, just how they behave and socialize. Edit: Poor handwriting is in fact more common in Aspergers. But not always.
neater is to tidier as messier is to sloppier
a lettering guide is a guide in using letters to make them accurate and neater.
Unreadable handwriting is often referred to as "chicken scratch" or "scribble." It can make it difficult for others to decipher the written text.
More neat, neater is not proper grammar.
sexer
neater
it is a place that is neater
fastidious
cleaner
The definition of 'effective' can be debatable, possibly taken as meaning readable or legible? The ways to develop your handwriting are twofold: practice and technique. The best techniques seem to involve relaxing your grip and developing a style of fluidly joining letters together. Legibility or readability come from accurate spelling, clear letter forms, consistent spacing etc.