The smoothest amp you've heard?

When I hear the term smooth I want to scream! I don't understand what smooth even means? Maybe because I'm a winemaker and "smooth" in the wine world is a term used when not being able to evaluate complexity. Like wine when listening it can also be a complex experience. Smooth can be construed as a number of sonic observations. Its non specific. The term Smooth sounds boring. I'm using a Gryphon Mephisto, "smooth" doesn't come to mind. Many other attributes do.

I comprehend the sentence and premise. Its a very good technical explanation. However, the point I was attempting to make was, from a sonic perspective "smooth" doesn't present itself as something I am attempting to ascertain, or looking for in a amp? I have listened to many amps, I never recall saying "that amp is so smooth". I'm not trying to sound disrespectful. I think its a useless adjective when evaluating sonics of a component. Do you think a sound engineer says "we have to do it again, not smooth enough" IMO, Its a pointless term.