My issue is that I don't use the Tags very well, honestly I ignore them. I should probably take some time and setup the tags, but I haven't so far. I'm not sure how many others fall into this category, but the problem for me is that when I do go to SF there is a ton of stuff I'm not interested in, and consequently I burn out and stop looking for questions to answer.
If this is related to just me, the easy fix is that I need to do something about it (learn the tags). If this is related to more people, maybe something needs to be done to make the tags easier, or prompt for more use of the tags.