Before getting into the main topic, I would first say that people are not only trying to be like others; rather, they're being quite forced to be like others, to follow them whether they want to or not. To those naughty individuals who fail or refuse to do so, there are dire consequences. We moderns have exchanged our schools of thought for one massive school of fish. And God help anyone who doesn't swim just like the others and in the same direction. If you haven't read Brave New World, Animal Farm, and 1984, I would highly recommend them...before the book burnings begin. And I would suggest the Gospel of Saint Matthew as well. It's both "organic" and beautifully contrary to the mindless school of fish. Anyway....
The term "organic" has unavoidable associations with food and gardening. We couldn't separate it from those, and so that's where I would begin in the application to music. In that context, organic means pure, natural, wholesome, earthy, and free of chemicals and pesticides. In music, I interpret the term to mean simple, clean, direct, uncluttered, and especially similar to natural or acoustic musical sounds.
I think it would be an over-simplification to equate organic with analog, as opposed to digital, because digital instruments can now convincingly emulate a classic analog quality. But in my opinion, an analog-like quality - regardless of the source - is at the heart of the organic quality. I think this goes beyond the other terms we often use to describe analog tone - such as warm and rich. I think organic implies a certain roughness or unpolished quality as well, such as one hears in the older analog instruments. And to make one last point, I think the many instruments reissues we've seen lately do manifest a desire to return to an organic quality in electronic music. I would put the revived ARP synthesizers right in this category. I find them to be wonderfully organic.