The sound of early Clavia was definitely "unique" in my opinion. Personally I was never a fan of it at all. Never understood the hype and like for the Nordlead. But it was definitely unique.
Same as with the Waldorf Q, I never understood how people could like it. Sounded so brittle, cold and weird to me.. but it too was definitely unique sounding.
Then again, I absolutely loved the sound of the Yamaha AN1x and I had colleagues who couldn't understand my love for that thing. As usual, there's no use arguing taste.