Being delayed by a "good morning" from an oblivious coworker? More than just annoying. (Obligatory "pleasantries" from coworkers who otherwise take glee in making you miserable and obstruct you for sport? Much, much worse.) We're not friends--we're coworkers, at least nominally, and I probably have a stack of shit this high to deal with--that you may or may not be the cause of. How about this for being "nice": don't force me into dealing with your bullshit, against my wishes. Where's your recognition that I'm a human with feelings and needs?