Eh... if it sounds good to your ears, that's all that matters; and in the hands of someone who has things dialed in, and hitting all the right notes, it's probably going to sound good to most others as well.
Myself, however, am one of those cork sniffin' tube aficionado types. My ears are sensitive to details and highlights. When I'm playing for myself, or listening, and I mean really listening, to what's coming out of someones amp... my ears long to not only hear the note, but what happens immediately after the note. That harmonic, bloom, chime, after note, momentary decay, etc... that tiny little, blink (with your ears), and you'll miss it detail, that happens in that instant after a note is played. And while I have heard some amazing sounding SS amps (which were also conveniently paired with amazing playing), I have yet to hear one that legitimately reproduces this effect in the same way that a tube does (to my ears).
Then there is also the way a guitar can interact and manipulate a tube amp... you sort of become one with the amp, and figure out how to strike a note of chord just so to either get a tight accurate sound, or heavier attack to get some grit or sag. Yes, you can get some interaction with an SS amp, but not at the same level of character you can coax out of tubes.
That's not to say I think anyone else should think or feel the same way I do on the matter... it's just the way my ears work and what they want to hear.