When I walk into a company (for an interview), I try to get a good look at the faces of the developers there, and gauge whether or not they seem happy. I figure

When I walk into a company (for an interview), I try to get a good look at the faces of the developers there, and gauge whether or not they seem happy. I figure "In 6 months, my disposition is likely to be the average of the ones in this room right now". So if the average person is happy, I'll probably be happy too. If everyone is sleep-deprived, pissed off, and miserable, I'm probably gonna be that way too. I always try to go out of my way to meet the team and shake their hands (even if the interviewer didn't plan for me to meet anyone). You can gauge a lot from just a brief interaction with people.