Flame

I chose to compare myself to fire, because it is unpredictable and it can grow anywhere anytime, or it can be put out anywhere at any time. They have some predictable patterns, but you can never be completely sure what is going to happen next. A fire can be really spazzy and go all over the place, or it can sit on the tip of a candle barely moving either way it does a lot of things. I can say something pretty smart, and then follow it up with the stupidest comment of the week. Or vice versa.
I
Am a flame, turning and twisting wildly
The violent jerks could make a child dizzy
Do not try to judge me you will get lost
Do not try to change me you will go mad
Just let me shine and move about happily

I
Am a flame, giving light and heat for you
Try not to get too close as I go crazy
You will burn in a blaze of frustration
But don't go too far, I am not evil
Just stay near, and let me be what I am