@Pippinwhite -- It must be a man thing. My hubby loves them, too. Yes, I almost always use a big dollop of peanut butter in the cookies. I add it after I take the sugar/cocoa mixture off the heat, and before I add the vanilla. Sometimes, I use the extra chunky peanut butter, for a little extra texture for the cookies. It seems to work very well.
I have a friend who used to add dried cranberries to the sugar mixture, along with peanut butter. Gave the cookies a sort of chocolate-covered cherry feel. It was really good, but my hubs isn't into the dried fruit thing, so I usually leave it out.