Tube amps lean towards even order harmonic distortion which has that warm sound. Odd order harmonic distortion would have an undesirable harsh sound. That's why a little bit of tube HD doesn't sound so bad and some people desire it.
Electric guitar players prefer tubes because when a SS amp overloads and clips you get a lopped off top and bottom, reminiscent of a square wave which has those odd order harmonics. So the guy with an electric guitar generally is looking for that warm buttery distortion. Some Metal guitar players prefer a buzzy sound where there are those odd order harmonics and then they scoop out the mids to emphasize the buzziness.
thanks for explaining..didnt know that... well..learned a new thing again... ur never to old to learn