It is... disconcerting... and yet strangely exhilarating to see Jim playing someone this evil. Because, while Mr. Emerson's evil roles are noticeably visually different from Mr. Finch (to my eye at least), Warden Hobbs looks just exactly like Mr. Reese. That cheery smile, crinkles in the corners of his eyes... his eyes look green in this lighting, although I'd go for blue in Person of Interest, but then, eye colour is deceptive like that.
Same posture. Same demeanor. Same way he turns his head. I can't help seeing a twisted Mr. Reese, and yet, not. It's... so odd. I enjoy watching his every move, but I very much want him to fail...
Oh, his eyes are so beautiful when he's looking worried.

Definitely green. And wonderfully expressive.
He even shoots in the very same way as he does as Mr. Reese. It's fairly realistic, too. He squints his right eye to aim. Either keeps it shut for a sequence of shots, or blinks for every one.

I also love the music.

I mean, of course I have loads of other impressions from the movie. But that would be spoilers, right?