Thanks, my concept of introspection borders on meditation. Looking at an idea detached to see it as it is. Then feeding that back into my thoughts on what is good or bad, or whatever may be troubling me. Though I admit, I have taken it too far in the circular non-direction before breaking out before. But that's what I used to enjoy about introspection. Once you found a circle in your reasoning it gives you an opportunity to step out and examine what is causing you to reason in circles. Thus allowing you to glimpse the restrictions of your categories. Thanks for pointing out the danger of categorizing within our experiences. That is a much more pressing fault to me.
(I knew the definitions in theory, but I questioned them in practice; I don't meditate.)
[edit: You know, after watching the TED speech on success, and a bit of introspection, I see where you are coming from. Introspection has pulled me out of a depression, but it has also contributed to my high difficulty relating to other people. I guess I just reacted to the phrase "'highly' overrated". Which just reinforces my thought that most non-measurable disagreements between people are a failure to communicate effectively.]