That's really interesting Fretscource, and thanks for taking so much trouble. I'm pretty sure I would have picked SF as being minor (or at least having minor chords in it). Maybe even modal (although my level of theoretical knowledge would by then have been at its limit).
However, probably in reality I would have played around to find chords that would 'fit' and hopefully come up with a Dminor (being one of the minor chords that I know) and then see what else sounded right.
If I 'fail' with a song I usually either give up, fill in the missing chords with a couple of melody notes, or look up some tabs - mainly because actually knowing what the key really is, is usually not what I'm trying to find out - and yes, I'm going to be thinking of that now......and my ears thank you
Thanks also for this whole thread, it certainly helps to have such practical advice that is linked to how music
sounds (instead of just how it appears on a page).
One good thing about music is that when it hits you, you feel no pain - Bob Marley