As Kuroyume says, there's no good reason to have absolute rotation on
a 'realistic' figure.  The limits on real bones and muscles are always relative to 
the nearest connected part of the body.

I can imagine a couple of special cases where you might need to sense and
control each angle in absolute terms: maybe a planetary system, or
a robot arm that moves things within its own small 'world' while the whole
'world' is riding on a larger conveyor belt.
 
Is that the type of setup you're considering?

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