Lazy design puts me off.
There is this notion that Bronies dislike Equestria Girls because Hasbro has defined the human form of the Ponies and shattered our hopes, dreams and what not. But apart from the abysmal and generic setting of the movie (high school ... did we really need that?) the design is the biggest hit in the teeth for me :).
Especially the skin colors. Twilight is a purple girl? Rainbow Dash is blue? Really. That just screams lazy design to me. Because the colors do nooooot match, the clash. It looks weird.
The argument can be made that the ponies in all weird colors looks weird too. And they do to some people. But I guess it's not completely fair because Equestria is a land of fantasy while the movie takes place in a dull high school :) .
Summary:
Cookie-cutter (potential) boy friend
Generic high school setting
Weird design choices
Does anyone agree?