Personally, I think this is about 10 years too late for me to really get excited about animated sprites. They have been an industry standard for more than a decade. :/
That being said, I think that the Gen V pokemon look great when animated. Single sprites on sites like Serebii and Bulbapedia can't do the designs justice. Standouts for me are:
Reshiram
Zekrom
Zuruggu
Shimama (I love that its mane changes colors!)
Dokkora (the way it tosses that log around is awesome)
And that's as far as I've really gotten in the games. I'm only in Laimon City. Can't wait to meet Emonga on the next route!