Good topic! I love this. We can share something we do not know or did not fully appreciated here.
My favorite quote is...
NOTE: This might be a spoiler for those who have not reached to the epsode 345.
Vermouth: "Why did you save me? Why?"
Shinichi: "Is a reason nesessary? I don't know why you would kill someone. But as for saving someone...A logical mind isn't needed, right?"
This is from the episode 345 in a flashback of Vermouth. Vermouth remembers this, holding a gun directed to Ai and Ran, who is protecting Ai with her body. Such a cool thing to say.
I hope this one runs and runs.