Very fond memories of couchsurfing met very nice people both as a traveler and a host. But this was long ago. Not sure this will ever work again though
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I'm not living in a very touristic area, but every other month, I get a request for a night and if it fit's in my schedule, I'll accept. It's been only nice experiences so far and no one gave me the vibe of seeing it as a cheap alternative to hotels only. Most people ask on bewelcome.org by the way.
I just like that even though I stay in my bubble most of the time, I get the opportunity to spend some quality time with a stranger. Especially because those strangers are often on some kind of a mission, else they typically wouldn't come to my area.