Palmer Luckey says you don't need to be a larger-than-life character to run a defense company. But it does help with recruiting: "Some of the most successful defense companies I know are run by very competent operators. They're the most straight-laced guys you've ever seen." "What you see is—the larger-than-life characters are the ones that get the retweets." "The marketing that you see on Twitter—it's primarily a recruiting engine. I'm not marketing to necessarily the guy who's buying my…