I quote below some of the examples that hand writing does reveal one's personality:

Are You Obsessed With Sex?

"There are different things that can show obsession. People like Michael Jackson have phallic symbols in their handwriting. Usually that means an obsession with sex. Lower loops can represent the emphasis people put into physical action below the waist. These symbols could also appear in your writing if you're thinking about sex more than you usually do."

Detect Lying in Writing

"If you speak the truth, you don't have to think much about it. When you lie, you hesitate, because lying takes extra thinking. In writing in which someone is lying, there will either be a gap, the words will tighten up (as a person who's lying tenses up) or they will move out of alignment. If you practice noticing this, you can really tell when someone is lying."
...more

They say so
many believe too
i also intend to take help
my handwriting is too poor now

Yes...but nt to a larger extent...they might reflect d secrets wrt ur individuality...

Yes I have experienced.

Not really as though the mahatma gandhi had the worst hand writing he wa just gr8

Yes. "You write your signature for other people. Your signature is how you want to portray yourself to the world, while the rest of your writing displays how you really are. If your signature is very different from the rest of your handwriting, what you show to the public is not necessarily what you feel inside.

With the help of handwriting and content materials much can be depicted about a particular person. Good Handwriting shows that a person is much cautious about his/her work. Good sentences shows that the person is well mannered and civilized.

But if you see Gandhiji's handwriting, the above theory fails here. Gandhiji wanted to improve his handwriting a lot and had a good struggle for the same but could not.

Yes it is said so But i have not come across a concrete evidence to that

Why only handwriting, even the way one signs, the signature reveal some ... so says some.

Yes, to an extent because handwriting of a person shows his/her personality and his/her attitudes towards life.Even though its a small thing that we missed to notice,that small thing plays a big role.