By virtue of their electrical properties, tubes generate a special waveform when they're saturated, which is why tube engineering has tremendous tonal advantages over solid state or DSP solutions, particularly for crunch and lead sounds. Tubes enter the saturation zone gradually or softly, which lends tube-driven tone its trademark yet totally unique character.
View post (When they tell you you're good, when you're really bad!)
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My dad always says how good i am when i play something simple like a bit of tapping and then when i do actually play something really good doesnt say anything and he walks off half way through the piece i'm playing :(