I really wish there was an "auto tag" feature. Say, if a contact clicks on this image or button, they are automatically tagged as intereted in _____. This would save me a tremendous amount of time of going through the stats of every email, and adding everybody who clicked on something to the tag myself.
Great feedback! Although it doesn't use tags, we did recently add a click segmentation feature that allows clicks on a click to be automatically added to a list. Here is a Knowledge Base article with instructions.