James Lyttle knew the moment was coming, and he didn’t like where it led.  He was on the partner track at PwC, with his salary about to increase. “You’re a lifer before you know it,” Lyttle says. “The rest of your life, you’re sort of sucked in, and it’s hard to leave.” So he left, taking a career break to travel, meet people and see what other industries might be worth exploring.  It wasn’t a completely cold start. Lyttle leaned on contacts already in the industry.  “I began speaking to people and trying to get connected through them as well.…