Hello @Dev4,
Yup, very true, people like to bargain and fail to realize that Airbnb's are already reasonably priced, thus in such scenarios I try to explain what my place offers which other places don't at the same cost and also give them an idea of what an equivalent hotel would cost them, after which people are mostly understanding.
Reg. 2, 3, yes, they are very courteous and kind at heart, however most aren't accustomed to greeting generally because of the sheer amount of people we have in our country. I had noticed in Dublin, parts of Cali that even passerbys smile at you and say "Good day", but that's not something that happens in India. I'm sure the ones you've met in CA are used to greet one another since it's probably a soical norm in CA, and am happy you've had a positive experience.
I've had guests who haven't even bothered to inform me when they'd be checking in, whether they've checked in, whether they've liked the place or not, whether everything is fine, but that's just becasue they are mostly first timers in a BNB and are still learning. So I try to be patient there and I send them a message or give them a call from my end to check if everything is alright and if they've checked in.