1) It could be argued that the extent of my beliefs aren't known, so categorization might be incomplete
You can categorize what you do know.
2) A lack of voicing out opinions could lead to a perception of shallowness and lack of commitment to any cause
I'm not arguing for that; rather, I'm looking (or thinking, or wondering, or floundering, or haddocking) to see why people think what they think. Is it media influences, blah blah blah. And also, why it seems people are so predictable.
3) That I shouldn't give a rat's ass what people think and that I should just live life the way I see fit
Intrue, deed.
Here be Myth