Never wrestle your pedant into a box in my company, please. I am one through and through.One of the points of punctuation is to replicate the pauses and emphases of spoken language in written forms. A colon is "pronounced" as a pause and is slightly longer than a comma pause.
Star Trek (pause) The Next Generation
(wrestles inner Pedant back into box)
I guess I just never really thought of it in a verbal sense. I use them in writing. And I would likely have a pause in a sentence structure.
I just never have with this. It could just be a learnt habit. Or it could be it just sounds a bit ostentatious in conversation.