I've come up with a decent enough direction for my character. Her powers manifested when she became the owner of a legendary cursed flute. She's still inexperienced, but her abilities will have to do with using the flute's music to create illusions and to control fiendish servants. I still have to do some thinking about a face claim.

I read over your notes/guidelines again and they all seem good. I don't have any issues with sharing control over my character with the GM. It makes me feel more invested to collaborate on things, and in my experience more GM control helps the game proceed to the action and other juicy bits.