Read through my course evaluations for the physics class at the university this past semester. Mostly positive. Got some of the typical "make the class easier" comments. A few really amused me in response to "What did you like LEAST about the class?":
Office hours held before class encourage doing homework at the last minute.
Critical thinking on the exams.
Having to justify my answers on the exams.
Awww...poor kids. ;)