If you think you would be a "bad" CFI, that means you have encountered a deficiency in your skill set. The proper response to encountering such is to remedy it, not to ignore it and continue on a predetermined path where you believe yourself to be hot s---. Particularly at the ripe old age of 18. If you are already so self-satisfied that you describe yourself as a "great pilot" and discount the necessity of learning new things, you are not on the path to becoming a professional.
Even if you have no intention of working as a CFI, the skills and mindset you pick up solely through the transition from student to teacher will serve you well for the rest of your career. Einstein's old chestnut about not really understanding something until you can explain it simply is in full effect in the aviation world.
Oh, and your projected flight time for the next few months? That resume comes across my desk, I'm thinking the guy logging all that time has either done some pencil-whipping, or was completely useless for a good number of those flight hours. And I know I said it in the last thread, but look into college, for God's sake. As competitive as the job market is now (and will continue to be, no matter what that idiot Boyd tells you), how do you think you'll look next to someone with comparable flight time, a CFI and a college degree?
Just for reference, I have my CFI, and I have never used it in a professional capacity. It's lying dusty in my room, lapsed forevermore. But the things I had to learn to get it have been critical both for getting jobs, and making sure I keep it.