As stated, nothing is right and nothing i wrong. If it works well for you then stick to it, but it doesn't hurt once in a while to test different setup.
As a Snowboard instructor in our small snowboard academy we recommend beginners to use duck stance. Something like +15/-8.
I started years ago with snowboarding. Then it was something like +20/+9 and keeping both hand forward like carrying a tray.
Now I am running +15/-15 on my park board (Salomon Drift rocker) since landing and riding requires switch. On my all mountain board (Nitro Team Gullwing) I have used +15/-8 but planning to change to same setup as in the park.
The only time I can feel a bit of a problem is in the button lift (don't know if that is the proper name - you have a round plats between your legs). With +15/+15 it sometimes feels like it will slip. Good part is that I can change between riding regular/switch.
-- Better to have tried and failed and not tried at all --