You have been riding Goofy(right foot forward). The only other stance would be Regular(left foot forward). If you are talking about the angle of your bindings(0,-15), there are a TON of different options. Your angles at the moment are ideal for freeriding. If you want to progress into the park soon, then a duck stance might better suit your needs. Duck includes 15,-15 17,-17 etc. This kind of stance helps when riding switch.