Well, this is just my personal list. The Twinkle MV won't be included, since it's just part of their subunit... and they just looked too good in that. XD There are multiple favorites for each member for me, but I wanted to have different MVs for each member, so... Enjoy!
Taeyeon: Mr. Mr.
Well, I personally LOVED her look in this MV, even if I didn't care too much for the song. The thing that made me really like her look is her eye makeup. It really sets off her beautiful eyes, and the screencap justified her overall look.
Honorable Mentions: Run Devil Run (Korean/Japanese), Genie (Korean), Into the New World
Jessica: Love and Girls
I really liked her hair and outfit in this dance MV. Personally, I like Jessica hair when it's wavy and a light honey blonde color, and she almost always pulls off anything she wears. I really want that polka dot t-shirt she's wearing! >.<