Ridiculously long interview process that took 5 rounds over 3 months: 1) Initial phone screen with recruiter 2) Phone interview with hiring manager 3) Follow-up phone interview with hiring manager and their boss 4) Face-to-face with hiring manager; video conference with their boss 5) Follow-up phone interview with manager of an unrelated department Screens and preliminary interviews were traditional background, skills, resume walk-through, etc. The face-to-face interviews were behavioral, e.g. "Tell me about a time when. . . "

Behavior-based interview with 2 different interviewers, and the hiring manager. Recruiters often didn't know much and didn't offer much in the way of feedback. I had to find out from the hiring manager where they were in the process because the recruiter was unresponsive.