Each of us have our list of favorite tags. When a question has tag(s) that match one or more of ours, the background gets highlighted, drawing our attention to the question.
It would also be nice to highlight (perhaps using a bold font) the tags(s) that matched our own, so one could quickly do a further filtering of the question to see if it is of interest at the present time, like the following:
e.g. arduino is in my list of favorites, but the other two in each question are not.