What attracted me to Linux so long ago is what ultimately drove me away. I now apply it only as needed because it's no longer simple ("stable" over the timescales I'm interested in) as a project, and it's not moving towards any type of consistency.

If you read "rolling stones gather no moss" to mean "keep moving or risk becoming obsolete", choose Linux. If you understand it as "change for change's sake prevents the achievement of mastery", go with a BSD.