William James once made an acute point about the relationship between happiness and expectation. He argued that satisfaction with ourselves does not require us to succeed in every endeavour. We are not always humiliated by failing; we are humiliated only if we first invest our pride and sense of worth in a given achievement and then do not reach it.
Nine times out of ten, I'm trying to meet someone else's expectations, whether it's the director or the writer or the animator, when I go back in to re-record a line. I'm the icing on the cake, but the cake is the thing. I'm really just a hood ornament on a very solid vehicle.