Another vote for solid state for Kirk, in principle. In practice, Kirk, ignoring Chu's question, would be off violating the prime directive with female blueshirts at BB.
Scotty is solid state, too (though for Scotty, he'd always be having trouble getting 105% out of his transformer and his subwoofers would always be on the verge of bottoming out...).
I agree on Tubes for McCoy and Picard.
Here's the question: tubes or solid state for Data? He is solid state, but longs to be more human.... Hmmm????
Wonder how big a WAF factor Counsellor Troy would be?
Would you get the Bose cubes for her?... I believe I just might!
Then I'd retreat to the HoloDeck where several oversized custom dream systems have been programmed by me for my enjoyment... might as well synthesize a 7-of-9 while I'm down there.
Of course Deanna would read my mind and I'd be immediately busted.
They seem to do that in real life too, come to think of it...