Teachers are all different, and I know I'm certainly not the norm.. but I actually love students that do there own thing.
I get to be the "mentor" as much as the "teacher" - its a lot more fun for me that way, but that's just me.
That aside, I don't want you to be rude to the teacher obviously.. but you are the client, you are paying for lessons, with actual money. This means that you get to have a say. You're not trying to tell your teacher what to do, just letting her know that you find it difficult to be motivated about what you're currently working on.. Or that you're interested in something like theory, which is sometimes uncommon and a teacher might avoid giving too much of it. Maybe you could do some of what she wants and some of what you want??
...if your teacher knows you want to do theory, and what kind of music you like then she/he knows how to structure a lesson that will motivate you and that you will enjoy. And if your teacher doesnt want you to enjoy your lessons I'm not too sure that being a teacher is a great idea for him/her. I'm sure your teacher would welcome your input - at the moment your teacher might think that you really like what you are doing?!