AFFC
Is there any villainy showmanship in that monologue though? It's worth remembering that the situation is different: he attempts to teach Sansa "the game" throughout the book, to make her a formidable chess piece; a smarter Cersei, if you will. In it he's explaining everything in simple terms Sansa can understand, like an entry test. Whereas his scenes with Varys are just him shooting the shit while tipping his hand to an opponent (the "foreign dignitary" scene in S1, last night's "when I told the Lannisters about the Tyrell plot..." scene, etc).
To me the only mustache twirling moment comes in the epilogue of ADWD, but at least the character involved is tipping his hand in a safe environment, with no fear of anyone exposing his plan
AFFC
I guess it depends on your definition of "villainy". But so far, I've felt that Littlefinger and Sansa's time in the Eyrie can largely be described as Petyr showing off his manipulative abilities. You can dismiss it as him attempting to teach Sansa if you want, but he definitely exudes a Snidely Whiplash air. Especially when he's constantly asking Sansa to give him some sugar when people aren't looking. The guy is a mustache twirler through and through.
True, but that is different from stating your master plan to the bloody spy master of the realm.
I hardly call that a plan so much as his world view.