There has been a few research done to see the link between a person's personality and his handwriting. This was something that really intrigues me.
If letters slant to the left: Indicates introspection and a lot of emotional control.
If letter slant to the right: Reveals a person who's outgoing, friendly, impulsive, and emotionally open.
If letters are straight up and down: The sign of someone who's ruled by the head, not the heart.
Letters that slant in more than one direction: Indicates versatility and adaptability.
Heavy pressure writing (like you can feel the rib made on the back of the paper): The writer is agitated.
Moderate pressure (the writing is dark, but you can't feel the rib on the other side of the paper): Shows ability to deal with stress.
Tiny letters: Indicate the writer is has somewhat low self esteem but is intelligent.
Small letters: The hallmark of quiet, introspective types - they're generally detail-oriented and have good concentration.
Large letters: Sign of a confident, easygoing individual.
Letters that don't touch: Indicate an impulsive, artistic, sometimes impractical free thinker.
All letters making contact: The sign of someone who's highly cautious.
A final stroke straight across: The writer is cautious.
An end mark that curves up: Reveals generosity.
Perfect penmanship: The hallmark of a communicative person.
An indecipherable scrawl: Indicates a person who's secretive, closed-up and likes to keep his thoughts to himself.