From what i have seen and heard I thinks instruments he really likes to use are: WW: Clarinets Most commonly used woodwind in his writing. BRASS: F Horns Most commonly used instrument in the orchestra! To be honest the man is a genius, i just think he uses the horn way way too much. IMO PERC: Timp, Piatti's, Glockenspiels. BOOMTZZZZ DING, DA, DINGLY, DING, DING KEYBOARDS: Piano, Celeste. Pianos and the Celeste a usually never ever used in classical repertoire, well at least not as extravagantly as JW thats y i think he really appreciates the effect the instruments have on an orchestra. I would say this would be his favorite because its his primary. HARPS:Harp(altho may not be used alot in a piece you can tell by his scoring he really does love the instrument)he puts Harps in every piece. Now studying Schindler's List you can really see his love for the harp come throughout the score. STRINGS: Cello(WOOOHOOOO baby!!!) you can commonly see how JW uses the cello to really create most of his moods. pitch and sound-wise they relate to the horns very much, so you commonly see them doubled together quite oftan.