What is your handwriting saying about your personality? Are you vain? Are you humble? Is your prospective employee honest? Handwriting is an ideomotor (ideo- mind, motor-hand) response. It is linked to our subconscious mind and as we change in life, so does our handwriting.
Goals. Your goals are seen on the t crossings. A straight and defined crossing shows your level of commitment to your goals.
Self Esteem: the T crossing shows your level of self-esteem; the higher on the T stem, the higher your self esteem. If you want to improve your self esteem, make a conscious effort to do the following as you write:

Make your T crossings higher. Make your handwriting larger and when you write your name down, underline it. Never cross out your name. It is like invalidating yourself.
The i dot is a great clue for handwriting analysis. If the dot is exactly above the i stem, you are someone who pays attention to detail and are very organized. If the dot is before the stem, you probably are someone who procrastinates. If the dot is after the stem, you probably are someone who wants things right now, a little impatient maybe.

These are the mechanics of it. As you write down your words your hand moves steadily to the right, if you cannot stop that movement for a second to write down the dot, you probably tend to be in a hurry to get things done.
Stress levels. Someone with high stress levels pushes hard on the paper, to the point that you can actually "feel" the handwriting on the back of the paper. Reduce stress by holding your pen with a softer grip and let it barely touch the paper when you write on it.
People who are eager to make a good impression on others (probably vain) make their signature nicer and larger than their regular handwriting. The opposite is also true, modest people make big and fancy handwriting with a smaller signature.
The type of person who signs their name exactly the same way they write other material is the "what you see is what you get" kind of person.
I suppose that after these tips you will never look at handwriting the same again.