Naked-neck chickens (Turkens) by far!! I just got two of them. They are about 5 weeks old now. They are so ugly, they are cute!! Only a momma could love. Ha! You should google them to see a picture.
Silkies and modern bantams usually do it for me. Turkens are quite the head turner as well. Also, I find that anything laced, especially silver laced sebrights are very popular. I had a ton of people try to buy a pair off me a few years fair simply because they loved their coloring.