I see this with developers: The young gun who assumes he understands architectural concepts without reading up on them, and re-invents the wheel (often produci

I see this with developers: The young gun who assumes he understands architectural concepts without reading up on them, and re-invents the wheel (often producing a wheel that's tough to turn). Then there's the cocky senior who doesn't need the latest and greatest because he already "knows" they do the same thing as his solution from 15 years ago (and when he's fired he can't find work because he's a dinosaur). I know, I've been guilty of both :D Edit : Come to think of it, the worst offenders are buzzword spewing managers and sales guys. "Oh the Cloud? Our product can mesh your business objectives with transparent synergies through the Cloud! Trust me, I'm an expert! Ah-hah-hah-haa"