Star, that is so interesting! As you say, your exact type doesn't matter so much as knowing what works -- and why. Your story suggests how individual we are, for sure, and also how dyeing our hair can alter the profile somewhat, and that gives us new options to play with. You have the information and now you can pick and choose, depending on where your hair is at, at any given time.
I was born a strawberry blonde! But quickly turned into a towhead (very light blonde) toddler, and then darkened with puberty to a mousy dark blonde (that I highlighted, of course). I can tan lightly too -- with sunscreen (I will burn without it). My skin tone is cool-neutral but my eyes and hair are (now) entirely cool. When I was blonde there was some warmth to my hair. But if it started turning brassy or was too yellow a blonde, my face would immediately look reddish and sick, which shows those cool undertones predominate.
I dyed my hair an auburn colour in my 30s for a while. Except for the speed at which it faded out, I loved it! It suited me, too. But I did change the colours I wore to a degree. I wore more chocolate brown, more purple, and more greens. I continued to wear my blues. My reds didn't work as well on me. In fact, red looked best on me in early childhood (around the age of 7) and now. In between, it was trickier to get right. I think that was due to the various dyes.
,Janet yes -- I can see that -- deep maybe makes more sense, but verging toward medium now that those greys are softening the overall look. And you absolutely have great instincts! It's your artist's eye. It's quite intuitive for you, I think. It is intuitive also for me (though I'm not an artist) but I like the simple explanations and the recognition that just because one's colouring is on the lighter side, low contrast, and cool doesn't necessarily mean one is muted (which is what the seasonal systems all posit.)