Hmmm lets see....I didn't watch all disciplines with equal intensity (very little pairs so can't form an opinion there) but in each category...
Women's SP: Alysa Liu. So smooth and fluid, very lovely.
Women's FS: Kaori Sakamoto. What's with Japanese ladies and Chicago? Fun and sassy. Also, Petrõkina's Dune.
Men's SP: Hmmm...lets say Mihail Selevko's Nightmares program. I like hypnotic dark music, and skaters who can deliver to that. Ilia's and Kagiyama's SPs were ace material too, obviously.
Men's FS: Kevin Aymoz' van Gogh. Great artist portraying a great artist, oh yeah. ASHF's Dune program very close second. Yeah, I like my Dunes.
Rhythm Dance: can't really choose specific one. There were many quite good ones, but nothing which gave me "Oh I have to rewatch this 100 times" reaction. And many teams using same songs somewhat lessened the impact. But programs I liked in no particular order: Reitan/Majorov, PiriHara, Turkkila/Versluis, Fear/Gibson, Smart/Dieck...
Free Dance: Bet you think I'm bored of the Dunes? Nope

Smart/Dieck Dune FD was highlight for me, followed closely by Turkkila/Versluis fateful tango and PiriHara's Chorus Line. Loadsa very good free dances this year.
Synchro SP: Team Ice on Fire's (ITA) "Winter". This was like S/D Dune, somewhat lower ranked team delivering something so well choreographed and mesmerizing that it almost overshadowed the top teams.
Synchro LP: Rockettes (FIN) "Smooth Criminal". Energetic without being overwrought, I especially liked the 'quick' ending which leaves the viewer want for more. Team Unique's (FIN) killer tango was almost as good.