Do you tend to harp on?

Thinking about it, which is tough to do in a busy city, I may have to say - with of course, the utmost respect - that sometimes, that is to say often, I do, in my more vociferous moments, engage in an activity - action, if you will - which has in the past, will be in the future, and is in the present known as, forgive me, "harping on".