How about another interesting twist to this topic....
Do you ever choose colors on the basis of a personal and completely illogical drive to use a particular color or shade?
To answer the original question, I don't give a hoot about trends in color. I often make things in what are traditional summer colors in the dead of winter and vice-versa. Sometimes I choose the color scheme only after picking out a focal component I've eventually decided to incorporate in a design, but I never choose a focal according to a pre-existing color scheme.
To answer my own twist to your topic, sometimes I have an insane urge to use a certain color and lots of it, and nothing I make with any other color will please me until I get the urge out of my system. The last time I had this urge I produced a monumental necklace entirely in black, silver and black diamond and jet swarovskis. Before that, I had a compulsion for hot pink that to this day leaves me puzzled, I'm not a pink person, much less hot pink....but it took me a bead sculpture of a pink flamingo made over the course of 3 months to remove pink from my system...now I'm ready for it again - two years later LOL! Wonder what my next color-compulsion will be....
I love loads of bright colors, but seem to produce lots of monochrome (or almost) pieces
. My conclusion is that my use of color is "spiritual", coming from the inside, rather than tied to any particular fad, trend, or seasonal thing.
Nice topic, makes for some interesting conversation...and while we're on the subject - I discovered a very cool free software download on Eni Oken's site - IMO an EXCELLENT tool for all mediums involving color in some way:
Have a link and a nice evening! 
http://www.enioken.com/jewelry/colorschemes.html