I got the Aqua Blue color 3DS. Blue is one of my favorite colors so I was alright with it, but I really was hoping for a Purplish color, since Purple is also one of my favorite colors. But alas I did not get my wish.
I have a black 3DS. The aqua blue is a weird blue-greenish color even though I usually like blue. I would rather have a silver (like my DS-lite) or green, but the black color is ok (and looks quite cool)
I never got a 3DS but I am probably going to get one soon but I hope that when the OoT game comes out that they will make a Legend of Zelda 3DS to go with it if not I will get a aqua blue one or black one.