I'd argue there's a difference between normal confidence and over-confidence. I work with an over-confident guy. He's regularly a motor mouth in meetings, plays

I'd argue there's a difference between normal confidence and over-confidence. I work with an over-confident guy. He's regularly a motor mouth in meetings, plays up this wizened master persona, is never shy to aggressively give his opinion, etc which might be okay in some cases but the problem is he's pretty much an idiot. Most of his suggestions are borderline nonsense. Its hard to have a straight face when he recommends things like getting rid of our Drupal infrastructure because, "I can just make a website in Access and run it off the network drive," and other suggestions of that caliber. Even people who are amazing shouldn't act like this too often. Its bad politics and the guy you think is your force multiplier ends up being the guy who chases the other talent away. These people are toxic to organizations and unfortunately, they seem unwilling to change or even see what they are doing wrong here. I guess most people would call this the Dunning–Kruger effect, which may or may not be right, but personally I think it ties into some level of autistic spectrum stuff and as such is probably untreatable. The larger question, at least to me, is what do we do with people who don't fit into the typical office culture mold? The overconfident braggart personality probably fit some ancient evolutionary niche that isn't helpful in a lot of fields today. I guess these guys eventually migrate into jobs like sales that value casual bullshiting.