TRAPS: This is slightly different from the question raised
earlier, "What's the most difficult part about being a (job
title...)" because this asks what you personally have found most difficult
in your last position.
This question is more difficult to redefine into something
positive. Your interviewer will assume
that whatever you found toughest before may give you a problem in your new
position.
BEST ANSWER: State
that there was nothing in your prior position that you found overly difficult,
and let your answer go at that. If
pressed to expand your answer, you could describe the aspects of the position you
enjoyed more than others, making sure that you express maximum enjoyment for
those tasks most important to the open position, and you enjoyed least those
tasks that are unimportant to the position at hand.