The main elements about BJ Watling that I think mark him out above others are:
(i) He made some tough runs. He seemed to perform best when the team were up against it and made some really invaluable runs.
(ii) He gave a man of the match interview once where he could barely string a sentence together and sounded more like one of Beavis and Butthead. Sadly can't find the footage
(iii) He's described in the caption to this official BlackCaps You Tubes video as the "wicket-leper"
Ian Healy's biggest contribution on the other hand is crashing a Segway whilst linking items on an Australian telecast. Which will never not be funny.