Demography exacts a terrible toll!
When I did this, it gave me a nice long look into a part of Toronto that I'd only previously seen glimpses of at dive bars. It's pretty amazing to go into dozens and dozens of strangers homes and ask them personal questions.
I had one old guy tell me, when I asked him his marital status that he'd "murdered his wife."
"So, uh, that'd be widowed, I guess?"
Doing this also led to a "you WERE right, but you've gone too far, and now you're wrong" moment for me, as I found myself chasing an aged superintendent up the stairs of his building, yelling at him...
There was one nice, young, fresh-faced suburban boy working with us - he was kind of like a gentler version of Steve Zahn. But this job aged him about ten years. By the end of the census, he was the most grizzled employee, going to the rooming houses and bribing the inhabitants with cigarettes in order to get them to answer his questions. As far as I know, he didn't wind up on heroin, though. (I hope!)