On the Priesthood was helpful, and the background was truly fascinating. Because it was so very personal, it felt like a lot of false modesty colored the entire discussion.
The ascetic treatises were overwrought; core ideas of self-denial and discipline were of course very biblical, but the packaging was wrongheaded. Christians are in many ways free to live that way, and some good might come of it, but as far as the normal Christian life goes, that ain't it.
Homilies were very interesting, often quite good, but I was never quite sure how the application from any and every text was always "don't take oaths".