There is no fix rule for growing bonsai style. All the bonsai lovers develop the bonsai as per their liking. Let your imagine go wild and capture the style and shape from the nature. However I recommend only five bonsai style :-
3) Parallel bar
Do not worry much about the growing bonsai style and try to develop a good look. Photographs provided here is for a guidance. Either it will fall into some style or else
you will discover a new bonsai style. Start bonsai development with a new growing bonsai style