I once read this really awesome piece of advice on a photo blog:

The question to the pro photographer was: With digital photograph we can take millions of pictures really, really cheap, so how do we decide what to actually shoot?

The answer: When studying a subject think, "What would I name this photograph and/or how would I caption it? If you can't come up with something interesting or clever, you just may not need that shot.



So, yeah, captions/titles are important, imho. :)