Pastel Hair Dye: What's your choice? ;)

I am thinking about dying my hair lately. 

Because I got some coupon for it. hehe 

I don't know what is the best! 

Please help me!! 

1) Unicorn Hair

2) Purple

3) Purple and hot pink

4)Purple and orange pink

5) Dark Brown and white/Blond

6) Brown and Blush Green