I have this weird thing where I'm more interested in small little lines that take you multiple watches to get than monologues. For example, when Hugo Strange is talking to Mr. Freeze in Batman: Arkham City. Mr. Freeze has a flowery speech and asks Hugo if he felt something beautiful (I'm butchering it here, but it's something along those lines) and Hugo just answers with a nonchalant "no". Like that was enough to get me engaged with the character.
And there's the original Transformers movie where the Quentessons have Hot Rod and Kup captured. They plan on killing them in a Sharkticon but before they do so, they have this court. The Quentesson then asks "Guilty or innocent?" and then another one goes "INNOCENT" and they just drop Hot Rod and Kup. THAT line confused me. Like... wouldn't they be free if they were innocent? But then I realized "Oh yeah... they're evil...". And it's like my favorite scene ever.
In The Street Fighter (the 1976 movie) whenever Rakuda is on screen with the protag. He turns him into this walking contradiction. He talks about how "he works alone" and all that, but then you see that he's this huge softie with this guy he freed.
There's also a scene in Jojo where FF (a bundle of plankton) corrects Pucci on life, souls, and intellect and Pucci straight up goes "DON'T CORRECT ME LIKE YOU KNOW MORE THAN ME!!!!". I love when villains have this burst of pride.
Fantasia's Chernobog and how that contrasts with the Ave Maria song. That always tears me up. I love how simple it is. Also Hellfire from Disney. Whenever Disney incorporates Church music with villain stuff you know they got sumthin' cookin'.
Watership Down's ending where the bad bunny sees a rabid dog and goes "I AIN'T AFRAID OF NO DOG" and jumps towards him. I always respect when villains go down like champs.
Oh yeh and whenever Bean is on screen in Fantastic Mr. Fox. I love during the song scene, he just walks up and just lashes out at the singer like this:
I also love how when his dog went rabid, he didn't shoot him showing that at the end of the day, he's just a man. He's not REALLY a bad guy. When you think about it, Mr. Fox is.