Palm shape is very important in palm reading. Very often I happen to read palms. It's like a never ending learning. The more I practice, the more I discover that I know nothing!
I often said that head line is the most important thing to know someone's attitude and tendencies. But true to say that palm shape is the main thing that one should look at to know the person's inherent tendencies. For example, if someone has a square hand so surely
he is realistic,
he will never want to sit idly,
rather he will want to do something practical,
he spends money carefully,
he doesn't care much about mental emotions,
the longer his head line, the longer he will be capable of developing his career.
And in this case his head line should be a straight line that matches this character. But if it bends downwards, as it happens often, then it makes the person to work hard, his inherent qualities are still dominant but his emotional qualities like imagination, getting hurt with little words etc. are magnified and he becomes more sensitive. That's why it is important to see the shape of the palm at first.