I've said a few times now that I don't really feel that my view of songwriting fits in with the views of many other people here, and I've been surprised by the number of things that established members of the forum appear not to know. For instance, someone recently asked the question "Is there a definitive way to know for sure which key a song is in?"
Now for me, key is part of the basic language of music. If I'm performing or rehearsing an unfamiliar piece with someone my first question is "what key are we in?" You've got to make sure all the performers are singing or playing in the same key, otherwise it'll sound like Les Dawson. I suppose that's why it's called "key" - it's the key to getting the whole thing together. If you're playing in C, you know the main chords are likely to be C, G, F, A minor and so on. If you transpose it into D, they'll be D, A, G, B minor.
This is what I regard as pretty basic stuff. I've known about keys and key-signatures since I was about seven, I suppose - in fact I can't remember a time when I didn't know about them. They were part of my early musical training. You can't learn to play the piano or any other instrument from sheet music unless you know about keys. You can sing without knowing what key you're in - unless you've got perfect pitch, you probably won't know. But if you play an instrument I'd have thought that it was essential knowledge.
It's not just on this forum, though. There's a 17-year-old who performs at our community centre, and he's pretty talented on the guitar and several other instruments. He said he was confused by key as well and asked questions like "if it's in the key of G, does that mean it starts on the chord of G?" I explained that it didn't necessarily have to but I was surprised that it needed explaining.
For me, as soon as I hear a piece of music I can tell you which note is the keynote. I don't have perfect pitch, so I can't tell you the key straight off, but if you tell me that (say) it starts on an E then I can work out the key straightforwardly. I don't even have to consciously think about it.
I would really like to know how so many experienced musicians manage to communicate with each other without knowing one of the basic concepts of music.