It depends. I've interviewed many people applying for jobs (more than hundred, I don't know exactly how many, I've lost count). Applicants come in many shapes and forms neither can nor should be evaluated in the exact same way, so I look at many things when evaluting them: Do they have relevant education? Have they done interesting work? Have they done anything interesting outside of work? Can I have a good conversation with them? Can they solve the toy problem I give them? Do they freak out when I push them beyond their zone of comfort with respect of what they think they know they can do? One thing I've never done though: I've -never- frowned on anyone for leaving a job they didn't like.