When I first started hosting, most people had a description about themself -- profession, interests, schools attended in addition to the city & state. Now I'm noticing a trend toward only knowing if people are verified and the city and state. In addition abstract, blurry or childhood pictures shouldn't count. So, I whole-heartedly agree that some sort of GUEST PROFILE DESCRIPTION SHOULD BE A REQUIREMENT to be a guest, in addition to a CURRENT PICTURE.
I do have my response for those instances where people are guarded or aren't thinking that it's not important, saying I notice you're new to airbnb, please give me more information about yourself. Sometimes people just tell me more about the reason why their staying rather than answering my question. And some people think they have to give me too much information. That's why it'd be nice to have some required descriptor fields and the reason why they're required -- staying in someone's home, helps with trust building, etc.