I don't feel all the plastic-on-plastic scratchiness that people complain about with Cherry, not with blue, brown, clear or red. I did have a few brown switches in my Filco MJ1 that were physically and audibly scratchy from new, which was annoying. I don't notice that any more though, though I think the feel is still there.
My Quiet Pro, though, has switches that feel slightly juddery, like the slider repeatedly digs in on its way down. This is ironic considering that the orange pigment was abandoned due to it affecting switch feel. It's a real shame, as the feel of quiet click switches is otherwise excellent. The new ones have a grey slider, so maybe the plastics have been changed and this is no longer a problem; I really don't know. I do know that I am not alone in having this issue with the quiet click switches.
MX clear on the other hand feels smooth. Not like blue Alps smooth — nothing else compares with those.