Ooh nice thread!
I tentatively self-diagnosed a little while ago as Bright Winter and have been testing the hypothesis ever since. I'm still not dressing strictly to the palette but I think I look better when I do.
I'm sure you've already discovered what a great resource 12 Blueprints is. I found this rundown on The Most Important Thing very useful and I'm experimenting with colours outside the palette based on brightness/contrast. I also really liked this analysis of how the colour palettes relate to each other. It gave me some ideas of how to colour outside the lines, so to speak.
From the pictures and the comments, deep Winter seems to be a good starting point for you. I wouldn't ditch colours you love outside the palette, but maybe think about how they mesh with your Most Important Thing, which would be deep.
Incidentally, I'm a lover of prints, plaids and all things multicoloured. Since researching this I've started to notice how few fabrics play to a single colour palette. Many of them stray all over the map, which is yet another challenge.