First: study a subject that I am passionate about; Second: have the opportunities to study wide varieties of subjects; Third: find a school environment that fit me well personally.
I like the specific way you list them, but they are all vague. I would be more impressed if you already knew a subject you were passionate about (even if you may find new subjects of interest in the future).
Oh!! I see that you do have a subject of interest. So instead of saying you want to study a subject you are passionate about, say you want to study theater, which you are passionate about.
Notice all the little changes I'll make here:
...not only because Theatre Arts is where my passion lies, but most importantly because I want to receive an education in wide varieties of subjects while majoring in Theater Arts.
:-)