The rule of thirds is probably my biggest pet peeve. All the rule of thirds is good for is balance but if you look through some of the best photos, the subjects can be centered, off centered, or even rarely in the corners.
The subjects of this photo (the two odd clouds) are at the very top AND the very bottom of the photo. But notice the photo is still plenty balanced. Notice you CAN have two subjects or even no subjects.
The point of these tips are not to try to sound pretentious or superior, but to get your creative minds flowing. If there's anything we need in the world right now, it's a lack of conformity.
Sure these rules can turn you into a good photographer, but breaking the rules can give you results unlike the others, which in my opinion can make you a great photographer.