Barrenechea is this Ph.D. candidate from Yale who thinks highly of his abilities. He's definitely a smart guy, it's just frustrating to have someone old enough to be your sibling teaching you. His comments on papers are useful but vary widely: what he focuses on correcting on your draft might be totally ignored in the final paper and you'll have a lower grade in spite of correcting everything he indicated was a problem.
He has a ways to go as a teacher in terms of leading discussions, sparking enthusiasm... but that comes with teaching experience, I imagine.
Antonio's not a very open person-- don't try and become his friend because it will get you nowhere. He warmed to our class by the end of the semester and only then would joke back or be more friendly. I think it took him a while to find his place, what with a gaggle of giggling girls staring at him for an hour and some twice a week. Seemed to want to cultivate an image of the wise instructor, and for a man who looks ten years younger than he is, that doesn't quite work yet. Also needs to figure out how to tell a chick to shut up and "no, you're just plain wrong" when she's been rambling on about her nonsensical take on a work of literature for ten straight minutes.
Altogether? A very smart professor, knowledgeable and had some very interesting things to say. Needs to work on his presentation, affect, and his holier-than-thou attitude.