My eyes a a sea blue I have been told but I think they look more grey than anything. I think that brown eyes make a girl look beautiful as they mesmerize me but I don't think that the eyes make a girl I think it is the personality.
Blue... The shade varies a bit depending on the lighting, mostly it's a slightly gray shade I think...
I have actually never seen real green eyes...
Anyway, most attractive? There's this certain shade of blue that I dunno what to call... Least attractive is a different shade of blue, that almost white one that makes the pupil stand out. But that's just my opinion~