Right now, very little other than one annoying coworker who feels the need to fill the office with mindless chatter constantly, because we all apparently need to hear about her drama and every fucking headline she sees on whatever news site she goes to.
But a couple years ago, we had a meeting/connecting-loving supervisor. The sort of no-life dweeb who babbles constantly (horrible at organizing his thoughts to be remotely concise, so he just droned on and on and on), needs to keep in touch regularly and was far better at wasting peoples' time than they were. I'm used to just doing my job and not talking with managerial types unless either they or I had something important or new to discuss, so that was annoying as hell to deal with him. Especially since, on top of that, he was a corporate suck-up, so if you did have an important concern, you knew you'd just get a "Well, we all have to deal with it, so just keep doing it and it'll blow over soon." response where you knew he'd babble at you about team stuff daily, but if you needed him, he'd be too spineless to actually stand up for you.