Do you ever intentionally/consciously offset parts of the rhythm section off of what would be "perfect timing"?  Like slightly delaying the snare, or having the bass slightly behind the drums, that kind of thing.  I know "backphrasing" is common for singing or soloing or other melodic stuff.  But do you ever do very subtle off-timing for groove sake?
if i actually perform it in real time, the timing will never be perfect. but besides that nothing is moved in the way you are talking about