Asking about how people spend their life is often illegal to ask. If you don't know the local laws only ask job related questions. This is why my company gives me a script of questions I'm allowed to ask - to get the conversation started on legal topics in ways that are unlikely to stray into illegal areas. (more than once I've had illegal information given to me - but I didn't ask so that is okay)

Illegal information isn't anything that will affect how someone does the job in general. You learn about personality, but I hope you can deal with those personalities anyway.