A triangle adds to the qualities of the areas signified by the lines. It seems you have what is called the “Great triangle”, formed by the lines of Head, life and Health.
The larger this triangle, the better will be the health. Yours is quite large!
It also shows generosity, talent and an interesting side.
The views of life will also be broader and the field of action as it were less limited. When the upper angle (made by the Head and Life lines) is acute, the subject will be more nervous, timid, and sensitive. (From the book Palmistry for All)
Regarding differences between the left and hand palms, in Palmistry it is believed that left hand talks about potential, while the right hand shows what you’re doing with that potential. 
So it is totally normal to have different lines in each hand. Some palm readers believe that "the left is what the gods give you, the right is what you do with it”. Maybe it means that you’re moving fast in life!