My heresy-
The looks don't bother me much, though it does have a 'strange' air to it, maybe because they are seldom seen on the K.
I just don't like them- on any gun. Maybe this old dog was just too old by the time I encountered them to learn new tricks, but they spook me.
I had a number of decades behind me cocking hammers that had some type of "dip" in them that the thumb could be forced down into. I always had strong hands- Dad had me cutting wire with a tiny pair of Kleins when I was 8, so it was no trouble dealing with a regular hammer. The hump back just doesn't give me that "positive control" feeling.

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Regards,
Lee Jarrett