Quick summary:
UK — most of my family, friends, and colleagues are taking precautionary steps with a general air of “we’ll get through this”. Only a few are ignoring it completely or showing signs of panic or paranoia. Almost none are taking about it from a conspiratorial standpoint. Most live near Manchester or London, so are more immediately aware of infections and risk. Most are in advantaged positions to ride this out but think the government is mishandling the national response.
Spain — my family and friends are generally looking on at England and Italy with caution and beginning to make plans. A few have said they think the government (national and community level) should be imposing travel and public gathering restrictions. Some are not in a great position to self-isolate due to financial constraints (cost of supplies, loss of income as they cannot work from home) but are still trying to determine how they might be able to make it work. A few are planning for how to continue care of the older members of our family. Some of the younger family members are looking to the older ones to do most of the planning for them. The majority live in and around Zaragoza and Barcelona (with a few outside of Marseille) so the impact has not really yet set in.
US — quite few of my colleagues and friends are discussing the situation, some referencing various conspiracy theories, but only a few appear to be taking precautionary steps at this point. Many are skeptical of the actual risk or severity of the virus. A few have said that they have holidays planned for the next month and it would be very difficult to cancel plans (for varying reasons, but mostly financial and personal freedom related). We live in Maine (northern most east coast), But I manage teams on the west coast, as well. Nearly all have work and financial situations that would likely allow them to more easily self-isolate, if needed, but many don’t think that will ultimately be necessary. Opinion seems to be split as to whether the government is handling the response correctly.