The Twinkle Eye ponies always creeped me out as a kid. Now I think they look stunning with their unique eyes!
I thought they are a bit creepy until I met them in person. In the photos, especially with flashlight these eyes look a bit weird. But in the real life they are cute. I have Fizzy and Tic Tac Toe and I like them.
And my answer to the question is the whole G2 line. I almost completely missed it and I thought at first, oh... that's very horse-like but looking cheap. I had a Happy Meal Princess Silver Swirl, and I like her, but never had any from the main line. I found Lady Light Heart recently in a second-hand shop and I immediately liked her. In person she does not look cheap, smaller that the G1 ponies but not bad. So I just liked this simple, not too "extra" design.