if you're comfortable with it just go with what you're already using. the real advantage to a symmetrical duck is it makes riding switch easier. Of course you could change your angles and start learning switch, too. Every little thing you do snowboarding makes you a better all-around snowboarder. Learn to ride regular, then learn switch, learn your ollies and then jumps and then jumps from the switch stance, etc. It's all building blocks.
Good advice! I feel the same way, the more you can do, the better you're prepared for any situation on the mountain. All in all, I think it just adds to our ability to be able to balance and control our boards in all types of situations.