Complaining about poor internal documentation is an old practice, but there's a reason that doing it right is important. Your comments are the only way you have to speak to the next person looking at this software (that may be you) about the larger scope of the software, not just this line-or-two. What were you thinking when you wrote this code? Yes, "self-documenting code" is a goal, but it's arrogant to assume that you've achieved it, any more than it's arrogant of me to assume that my words need no editing. (They do. I'm happiest when I have an editor.)

Another common problem in comment ugliness is developers who update the code and don't update the comments; as one consultant pointed out, comments aren't tested. But doesn't that show a lack of attention to detail, too? Anytime you aren't paying full attention, you're apt to drop a logic bit.