I love Twilights because they are purple. The shape of her eye is really pretty as well and I like her lashes as well. Fluttershys is also really nice.

I lover her eye design and color, but I also love the color of Dashie's eyes.

Also Pinkie's eyes remind me of the sky. All their eyes are pretty though ^__^

Or Rarity

Well, they all have gorgeous eyes and colors (I mean, who wouldn't love to have magenta, teal, violet, lime green, or bright sky blue?!)

I love Dash's color, and Applejack's "sour apple" green---I've got green eyes, too, and hers just stand out and suit her so beautifully. I really like the Pinkie and Twilight shapes, having two sets of curved lashes. Dash's straight lashes are cool, too. Fluttershy's upper eyelid makes her look as docile, soft, and sweet as she is, and Rarity's almost diamond-like eyes with the abundant lashes and thick upper lid very much suit her, too.

:3

Do I even have to say it?

Rarity has gorgeous eyes. Twilight's are beautiful to though :)

Or Applejack, they're all so pretty.