I personally use MSH International for primary health insurance. I’ve heard good things about them in the past, although I don’t have much first hand experience with their claims department yet.
They are offer quite flexible packages, and you can reduce the price a lot by choosing to omit long-term cover in the more expensive countries such as the US and Hong Kong. You’ll still be covered in such countries for up to 60 days at a time for emergency care (similar to the health benefits of a travel health insurance), with no requirement to return to your “home country” to reset the counter (you’ll just need to leave that “zone”, meaning you have to go to any country where you’re covered for long-term healthcare).
I also recommend choosing a higher yearly deductible (in my case €750). It lowers the annual premium by more than the deductible itself, so it makes no sense to get the no deductible option…
As someone with no ongoing health problems (and in my early 30s) I pay €400/quarter for the Sapphire package with coverage zone 3 (most of the world, except a handful expensive countries where I have no desire to stay long term anyway).
I have also been looking at SafetyWing’s new Remote Health plan (which will be available for individuals very soon—just click the Sign Up button on the landing page and leave your name and email address and they’ll let you know), but haven’t decided yet if it makes sense for me to switch. Pricing seems to be similar, and they offer many of the same great features as MSH (including temporary coverage outside your coverage zone).
I’ve got to admit that I’m a fan of SafetyWing’s mission: To essentially build a country on the internet, or at least replace the kinds of “safety nets” we’re used to in Europe to let nomads and freelancers leave their home countries without giving up the kind of security we take for granted. I hear that long term they are even working on stuff like unemployment/income replacement benefits and pension plans, which I think is awesome!