If you are using Xpiks, it is really worth using the suggest keywords feature to check your image. It's really invaluable to allow you a quick look to see how much "competition" there is for your style of image. It's invaluable!

It will actually make the difference for me to decide whether or not I should bother uploading a certain type of image as it could be oversaturated or actually very few of that type in some cases.

Try it (if you use Xpiks)