This is an excellent question, Carol.
I'm funny i guess because as I was reflecting on this, I seem to have inconsistent “rules” for myself. I was recognizing that I haven't minded the testing to go to the United States or to come back to France (by which I mean that even though it was a little bit of a pain to set up in the United States and it cost me something, I didn’t find that a big enough deterrent to keep me away). I have gone home to the States twice since I could travel (basically I went back one week after I was fully vaccinated — so essentially as soon as it was physically possible).
I have been to both Norway and Italy for leisure. I didn’t need a test for Norway last summer, and while I did need one for Italy last month, tests are easy to come by here (and free if you're a vaccinated resident), so those didn’t trip me up either. For Norway I had to be fully vaccinated with an EU digital Covid certificate.
However, I haven't been to the UK since the pandemic started or has loosened. Largely because both the Uk and French governments have instituted such drastic measures with respect to traveling between one and the other (or simply haven't allowed it, for much of the pandemic), and in part a kind of philosophical and financial reticence to engage with all the UK testing, which seemed more designed to pad the pockets of UK testing companies than to actually root out infected travelers. And because of all the changes, I have never gotten to a point where I feel comfortable even making reservations to go to the Uk. I think I am finally there now - but now I have to wait a while to be able to book a reasonably priced ticket and find reasonably priced lodging.
The mask thing hasn’t bothered me at all, as we are used to wearing them here in France. In fact in Norway last summer I felt odd wearing one because no one else was — but then again I thought as a guest in their country, I didn’t want to bring in Covid — I didn’t want them to regret their decision to let in other Europeans. But I certainly got looks in my hotel breakfast room in Balestrand as the odd lady out.
I decided against a trip to Amsterdam, as it was becoming clear that neither restaurants nor museums were going to be open. I guess that's kind of my limit — if I can't participate in the sightseeing I want, I don’t see much point in going (unless I’m going to enjoy a week in the countryside with walks, cooking in, staying in by the fire, etc,).
(Also for those trips to the States, obviously I had an enormous incentive to do them in order to see my family. It didn’t matter to me there about what was open, or seeing attractions. I was there to see my people.)