i don't have a favorite honestly, theyre all beautiful. I guess if I had to pick my favorites they wouldn't be color ranges, but based on intensity. for example, two people can have blue eyes but one may have true blue eyes, like intensely colored, while another may have a more watered down greyish-blue color. one person can have brown eyes and other can have very richly dark, almost black, brown eyes.
i like the intense colors. the watered down colors are still pretty but I don't like them as much unless they are on skin that contrasts enough to make them pop, or with hair that contrasts to make the colors pop.
i like rich, very dark dark browns
very bright, true blues
bright, intense greens
i think hazel might be exempt from this. I've never noticed the color difference in hazel. however, hazels are really pretty when they have green in them.
ill vote black though (which is dark brown really, there's no such thing as black iris color I don't believe) because that's what color mine are and I'm obsessed with my eyes. I think they are muy muy bonita. lol
My type is guys with blond or reddish hair and light eyes. Mainly blue but green works too. I think part of it is that I have blue eyes too and it would be cool to have a blue eyed baby in the future. It would ensure that we looked like a family (and its awesome that if two parents have blue eyes the kid basically has to have them too).
i really wouldn't say a particular eye colour attracts me. I think all eye colours can be attractive. I voted for green because in general they are unusual and so gorgeous. If a guy I liked happened to have green eyes then they would be one of my favorite physical features. However if the same guy had brown eyes, I wouldn't like him any less.