First, I consider what is likely their personality type. As a trained personality type provider, this tells me a lot about the perspective and approach the person will likely take. It is surprising how accurately personality type tells about a person.
You can generally judge a man by his wife. Not so vice-versa though. Best to wait and see how big a heart she has. Most important. Also in business if a person tastes their food first before putting any salt on it that's a good assessment.