Depends. I rather have world most obnoxious but most skilled in history brain surgeon operating my brain than a nice guy soothing my ear but me dying on the operating table. Deep down we all prefer Dr House. But PC culture mandate we picked a more PC person. Always look for technical skills first then evaluate how you can work with that. You want a superior culture of technical expertise and have the team built around it. Not the other way round building teams around a nice bean counter...e.g. what happen to Philips.