This is exactly the sort of mother I love to see. I'm 14 with two parents just like you, and my best friend has restrictive parents like twistedtails seems to be, so I can offer a bit of insight: when a parent allows freedom of expression in things that don't matter much, the child will be SO much more likely to respect the parent's decision on things that DO matter.
Rebellious kids come from parents who restrict things like this, unique intelligent kids come from moms like you!