A more simple and less moody answer from my perspective would be the following order of priorities:
- security (balanced by usability)
- privacy (as long as there is no major impact on security)
- usability (if there is no major security or privacy impact)
- foss (whenever possible)
I care about all of them, just not equally. Otherwise I’d be using OS X (usability) or Tails (privacy/deniability) or some FSF-recommended distro for freedom.