Although I tend to like the 2D aesthetic more, it could be argued that quality of the sprites are not what they used be, given the time they were made. I thought the Yuri and King's sprites look particularly awful. On the other hand, I don't know any SNK game that had good 3D graphics either.
Yeah, some of them were definitely not great...both Yuri and Mai looked way to "kawaii" or "moe" or whatever you wanna call it compared to older sprites of theirs for my tastes, but overall I enjoyed the look of most of the characters much more than the style they used in SF4 for example...every time I play that one I still think "ew" to myself at most of the character models.