I'm not talking about clichéd subject matter, like sunsets, babies with pudding on their faces, or a black and white photo with a single red rose in it. That is an entirely different subject. I am talking about the old chestnuts that keep passing for wisdom in forums devoted to photography. These are the trite adages people use when they are stumped for something really useful to say.
Here is my list of my Five Favorite Clichés. Feel free to add any of your own that I might have missed:
1. "The best camera is the one you have with you." - this one is always used to make any discussion of upgrading to a new camera seem meaningless. On the surface it makes sense, since you can't take a photo unless you have a camera with you. But it really means you have no other options, so you settle for your camera phone.
3. "It is all about the glass." - always used to discourage people from buying a new camera, by suggesting they would always be better off getting a better lens. And sometimes it is true, but very often it can be wrong. Sometimes you really do need a better camera, so this is really an "always" that should be a "sometimes." Also, it really sounds pretentious when you call a lens "the glass."
4. "Zoom with your feet." - this one is designed to remind you that you really don't need a zoom lens. You can accomplish the same thing by walking 100 feet backwards or forward. Of course, this isn't always possible in the real world, like when you are standing on the edge of a cliff. But it sounds good, so people constantly say it.
5. "Different horses for different courses." - this one pops up whenever someone wants to make the point that some tools are designed for specific jobs and therefore do them better. This is actually true, but so obvious that repeating it over and over again becomes annoying. No one really was planning to use a wide angle lens to take long distance shots of birds and other wildlife.