I love Rochett FD costume, and Tanith and Ben free dance costume. Tanith's mon is quite good in that area.
The worts are Dom;Shab CD (at COC) OD and FD; Savchenko/ Szolkowy OD what a hell is that; and K/N OD and FD. Seriously that green from the OD costumes are just terrible.
Sinead Kerr's OD dress, both Kerrs' Ex costumes, and the Zhangs' SP outfits - especially hers, which is very classy. Among the ladies, like others have written: Yu-Na Kim's and Yukari Nakano's LP costumes. From the men, I've yet to see anything remotely appealing.
Both of Yu-Na's dresses.
Caroline's LP dress that she wore at TEB
Kozuka's costumes-as someone else already said, I like their simplicity.
Yukari's LP dress.
Savchenko/Szolkowy LP costumes
My dislikes
Taniths FD dress- I will probably be the only one but sorry, I hate it.
K/N's CD(Viennese) and OD; their OD costumes were especially distracting and I almost couldn't think about how much I didn't like the program because I could only see that garish green.
DomShab's FD costumes
If we could include outfits from previous seasons, I'd have to add:
Carolina Kostner's Memoirs of a Geisha Dress
Nathalie Pechalat's Red Tango OD Dress from 2007-208
Jenni Vahamma's Pale Green Dress from 2007-2008
Tessa Virtue's Dark Eyes Dress
Mao Asada's Red Czardas Dress
Sasha Cohen's Nutcracker Dress (The Candy Pink Dress)
Berezhnaya and Sikharulidze's 2002 Olympic SP outfits
I know most people hate this costume, but Domnina's OD one is one of my favorites this season!
YuNa's SP costume. Her LP one is pretty, but it looks too Kwan-inspired.
Rochette's LP. The color's lovely.
Mukhortova's SP costume.