Hi,
I wouldn't consider your tree to be dragon style. Dragon style is an very artistic style that is chinese influenced. The main trunk would have many twists and curves, like that of a dragon. Some of the twists may be very strong and this movement is emphasized. The tree actually looks like a chinese dragon.
There are examples of the dragon style and many other styles at:
http://www.bonsaimalaysia.com/html/bonsai_styles.html